EMS Technologies Canada A781-MK4 Aeronautical Satcom Transceiver User Manual 23 15 87

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Honeywell International Inc.

400 Maple Grove Road

Ottawa, Ontario, K2V 1B8

Canada

CAGE: 38473

Telephone: 800-601-3099 (Toll Free U.S.A./Canada)

Telephone: 602-365-3099 (International Direct)

Website: www.myaerospace.com

TITLE PAGE-1

Publication Number D201601000025, Revision 0 Initial 17 Mar 2016

23-15-87

This document contains technical data and is subject to U.S. export regulations. These commodities,

technology, or software were exported from the United States in accordance with the export administration

regulations. Diversion contrary to U.S. law is prohibited.

ECCN: 9E991.

ARINC 781-500 SDU and SCM

System Description, Installation, and Maintenance Manual

D201601000025, Revision 0

This document provides procedures for the equipment listed below.

Model Part Number

ARINC 781-500 Satellite Data Unit 90402750

ARINC 781-500 SDU Configuration Module - Single

SBB

90404775

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Proprietary Information

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WARNING: INCORRECTLY REPAIRED COMPONENTS CAN AFFECT AIRWORTHINESS OR

DECREASE THE LIFE OF THE COMPONENTS. INCORRECTLY FABRICATED SPECIAL

TOOLING OR TEST EQUIPMENT CAN RESULT IN DAMAGE TO THE PRODUCT

COMPONENTS OR GIVE UNSATISFACTORY RESULTS.

Honeywell is a registered trademark of Honeywell International Inc.

All other marks are owned by their respective companies.

ARINC 781-500 SDU and SCM SDIM

Document Number: D201601000025, Revision 0

Our products are under continuous research and development. Any information may therefore be

changed without prior notice. Honeywell reserves the right to make improvements or changes in

the product described in this manual at any time without notice. While reasonable efforts have been

made in the preparation of this document to assure its accuracy, Honeywell assumes no liability

resulting from any errors or omissions in this document, or from the use of the information contained

herein.

Honeywell International Inc.

400 Maple Grove Road

Ottawa, Ontario, K2V 1B8

Canada

Reception: 613-591-9064

Product Support: Aerospace Technical Support

1-855-808-6500 (U.S. and Canada) or +1-602-365-6500

(International)

Email: AeroTechSupport@Honeywell.com

Revision Table

Revision ECO Description

0 NA First release.

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TRANSMITTAL INFORMATION

REVISION 0 DATED 17 MAR 2016

THIS IS AN INITIAL RELEASE OF ARINC 781-500 SDU and SCM SDIMM, ATA NO. 23-15-87, ISSUED FOR

USE IN SUPPORT OF THE FOLLOWING:

Table TI-1 shows the applicable components.

Revision History

Table TI-2 shows the revision history of this SDIMM.

Table TI-1. Applicable Components

Component PN Nomenclature

90402750 ARINC 781-500 Satellite Data Unit

90404775 ARINC 781-500 SDU Configuration Module - Single SBB

Table TI-2. Revision History

Revision Revision Date

0 17 Mar 2016

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RECORD OF REVISIONS

When revisions are received, insert revised pages, record the date, and initial.

Revision Number Issue Date Date Inserted Inserted by (initial)

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SERVICE BULLETIN LIST

Service Bulletin

Number Subject Manual Rev.

Number Manual Rev.

Date

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LIST OF EFFECTIVE PAGES

F indicates a right foldout page with a blank back.

Section Page Date

Title Page T-1 thru T-4 17 Mar 2016

Transmittal Information TI-1 thru TI-4 17 Mar 2016

Record of Revisions RR-1 thru RR-2 17 Mar 2016

Service Bulletin List SBL-1 thru SBL-2 17 Mar 2016

List of Effective Pages LEP-1 thru LEP-2 17 Mar 2016

Table of Contents TC-1 thru TC-2 17 Mar 2016

List of Figures TC-3 thru TC-4 17 Mar 2016

List of Tables TC-5 thru TC-6 17 Mar 2016

Introduction INTRO-1 thru INTRO-6 17 Mar 2016

System Description 1-1 thru 1-10 17 Mar 2016

System Operation 2-1 thru  17 Mar 2016

Installation 3-1 thru 3-28 17 Mar 2016

Testing and Fault Isolation 4-1 thru 4-18 17 Mar 2016

Maintenance and Repair 5-1 thru 5-4 17 Mar 2016

Appendix A: Return Material

Authorization

A-1 thru A-2 17 Mar 2016

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TABLE OF CONTENTS

Title Page

INTRODUCTION

1. Illustration of Equipment ......................................................................................................INTRO-1

2. Acronyms and Abbreviations ...............................................................................................INTRO-2

3. Safety Advisories .................................................................................................................INTRO-4

SYSTEM DESCRIPTION

1. Inmarsat System Overview ........................................................................................................... 1-1

2. Equipment Overview..................................................................................................................... 1-2

3. Equipment Specifications.............................................................................................................. 1-4

4. System Interfaces ......................................................................................................................... 1-7

5. User Interfaces ............................................................................................................................. 1-8

6. Software Description...................................................................................................................1-10

SYSTEM OPERATION

1. Registering and Activating Terminals............................................................................................2-1

2. Using the A781-500 System .........................................................................................................2-2

3. Channel Status and System Configuration ................................................................................. 2-16

4. Maintenance Mode ..................................................................................................................... 2-22

INSTALLATION

1. Advisories ..................................................................................................................................... 3-1

2. Pre-Installation Inspection............................................................................................................. 3-1

3. Installation Procedure ................................................................................................................... 3-1

4. Connection Details........................................................................................................................ 3-2

5. Owners Requirements Table (ORT)..............................................................................................3-7

6. Passive Intermodulation (PIM) Test .............................................................................................. 3-7

7. Installation and Engineering Drawings........................................................................................ 3-11

TESTING AND FAULT ISOLATION

1. Operational and Diagnostic Testing .............................................................................................. 4-1

2. Troubleshooting and Fault Isolation..............................................................................................4-8

3. Adjustment/Alignment Procedures .............................................................................................4-18

4. Modification History ....................................................................................................................4-18

MAINTENANCE AND REPAIR

1. Maintenance .................................................................................................................................5-1

2. Repair ........................................................................................................................................... 5-1

3. Instructions for Continued Airworthiness ......................................................................................5-1

4. Visual Inspection and Check.........................................................................................................5-3

APPENDIX A: RETURN MATERIAL AUTHORIZATION

1. Warranty Returns......................................................................................................................... A-1

2. Non-Warranty Returns ................................................................................................................. A-1

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3. Repackaging Requirements......................................................................................................... A-1

4. RMA Procedure ........................................................................................................................... A-1

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LIST OF FIGURES

Figure INTRO-1. Satellite Data Unit ...............................................................................................INTRO-1

Figure INTRO-2. SDU Configuration Module .................................................................................INTRO-2

Figure 1-1. Simplified Aeronautical Satellite Communications System .......................................... 1-2

Figure 1-2. A781-500 Avionics System .......................................................................................... 1-3

Figure 1-3. A781-500 Avionics System Block Diagram..................................................................1-7

Figure 2-1. TCP Screen..................................................................................................................2-3

Figure 2-2. A781-500 TCP Menu Structure.................................................................................... 2-4

Figure 2-3. SBB Menu .................................................................................................................. 2-16

Figure 2-4. SATCOM LOG 2 menu ..............................................................................................2-18

Figure 2-5. SATCOM CONFIG 1 menu........................................................................................ 2-19

Figure 2-6. SATCOM CONFIG 2 menu........................................................................................ 2-20

Figure 2-7. SATCOM CONFIG 3 menu........................................................................................ 2-21

Figure 2-8. SATCOM CONFIG 4 menu........................................................................................ 2-21

Figure 2-9. SATCOM CONFIG 5 Menu........................................................................................ 2-22

Figure 2-10. Maintenance Mode TCP Menu Structure................................................................... 2-23

Figure 2-11. SATCOM PARMS ...................................................................................................... 2-26

Figure 2-12. SATCOM OPTIONS................................................................................................... 2-27

Figure 2-13. CONFIG AUDIO 1/2...................................................................................................2-28

Figure 2-14. CONFIG AUDIO 2/2...................................................................................................2-29

Figure 3-1. Top Plug Pin Deviations............................................................................................... 3-4

Figure 3-2. Mid Plug Pin Deviations ...............................................................................................3-5

Figure 3-3. A781-500 SDU Outline and Installation Drawing, PN 90402752 (Sheet 1 of 3) ........3-13

Figure 3-4. A781-500 SDU Outline and Installation Drawing, PN 90402752 (Sheet 2 of 3) ........3-15

Figure 3-5. A781-500 SDU Outline and Installation Drawing, PN 90402752 (Sheet 3 of 3) ........3-17

Figure 3-6. A781-500 SCM Outline and Installation Drawing, PN 90404776 (Sheet 1 of 2) ........3-19

Figure 3-7. A781-500 SCM Outline and Installation Drawing, PN 90404776 (Sheet 2 of 2) ........3-21

Figure 3-8. A781-500 System Interconnect Drawing, PN 90402748 (Sheet 1 of 3)..................... 3-23

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Figure 3-9. A781-500 System Interconnect Drawing, PN 90402748 (Sheet 2 of 3)..................... 3-25

Figure 3-10. A781-500 System Interconnect Drawing, PN 90402748 (Sheet 3 of 3)..................... 3-27

Figure 4-1. Maintenance Cable ......................................................................................................4-2

Figure 4-2. SATCOM Subsystem Health Menu.............................................................................. 4-9

Figure 4-3. SATCOM System Bus Menu...................................................................................... 4-10

Figure 4-4. SATCOM Overtemp Menu .........................................................................................4-12

Figure 4-5. SATCOM SCM Menu................................................................................................. 4-13

Figure 4-6. SATCOM Subsystem Bus Menu................................................................................4-14

Figure 4-7. SATCOM RF Path Menu............................................................................................ 4-15

Figure 4-8. SATCOM USIM/DATA Menu ..................................................................................... 4-16

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LIST OF TABLES

Table Page

Table 1-1. SDU Physical Characteristics and Specifications ........................................................1-4

Table 1-2. SCM Physical Characteristics and Specifications........................................................ 1-5

Table 1-3. ARINC 781-500 SDU and SCM ERTCA/DO-160E Environmental Characteristics ..... 1-5

Table 1-4. SDU System Interfaces................................................................................................1-8

Table 1-5. SDU LED Status ..........................................................................................................1-9

Table 2-1. A781-500 System Log Status ...................................................................................... 2-6

Table 2-2. SBB Menu .................................................................................................................. 2-17

Table 2-3. SATCOM LOG 2 Menu .............................................................................................. 2-18

Table 2-4. SATCOM CONFIG 1 Menu........................................................................................ 2-19

Table 2-5. SATCOM CONFIG 2 Menu........................................................................................ 2-20

Table 2-6. SATCOM CONFIG 3 Menu........................................................................................ 2-21

Table 2-7. SATCOM CONFIG 4 Menu........................................................................................ 2-22

Table 2-8. SATCOM CONFIG 8 Menu........................................................................................ 2-22

Table 2-7. SATCOM PARMS Menu ............................................................................................ 2-26

Table 2-8. SATCOM OPTIONS Menu......................................................................................... 2-27

Table 2-9. SATCOM CONFIG AUDIO 1 Menu ........................................................................... 2-28

Table 2-10. SATCOM CONFIG AUDIO 2 Menu ........................................................................... 2-29

Table 3-1. SDU Rear Connector Pin Deviations ........................................................................... 3-2

Table 3-2. SDU Front Connector DSUB and RJ45 Pin Assignment .............................................3-6

Table 3-3. SCM D-Type Connector Pin Assignment.....................................................................3-6

Table 3-4. PIM Test Conditions.....................................................................................................3-9

Table 4-1 List of Required Test Equipment..................................................................................4-2

Table 4-2 Maintenance Port Connection Settings........................................................................ 4-3

Table 4-3 Menu 1 Item Descriptions ............................................................................................ 4-4

Table 4-4 Menu 2 Item Descriptions ............................................................................................ 4-4

Table 4-5 Menu 3 Item Descriptions ............................................................................................ 4-5

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Table 4-6 Test Setup Procedure ..................................................................................................4-6

Table 4-7 Power-On Test Procedure ........................................................................................... 4-7

Table 4-8 Power-On Test Procedure ........................................................................................... 4-7

Table 4-9 Post Test Procedure .................................................................................................... 4-8

Table 4-10 SATCOM Subsystem Health Menu.............................................................................. 4-9

Table 4-11 Bus Status Indicators .................................................................................................4-11

Table 4-12 SATCOM OVERTEMP Menu..................................................................................... 4-12

Table 4-13 SATCOM SCM Menu................................................................................................. 4-13

Table 4-14 SATCOM SUBSY BUS Menu .................................................................................... 4-14

Table 4-15 SATCOM RF PATH Menu ......................................................................................... 4-15

Table 4-16 SATCOM USIM/DATA Menu ..................................................................................... 4-16

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INTRODUCTION

This manual provides the specifications, principles of operation, and information necessary to install the ARINC

781-500 Avionics SATCOM System, including the Satellite Data Unit (SDU) and SDU Configuration Module

(SCM).

This document is divided into the following sections:

• System Description

• System Operation

• Installation

• Testing and Fault Isolation

• Maintenance and Repair

• Appendix A: Return Material Authorization.

NOTE: An Illustrated Parts List is not included with this manual.

Only qualified avionics personnel who are knowledgeable in the technical and safety issues related to the

installation of aircraft communications equipment should perform the installation procedures provided in this

manual.

This manual includes general installation guidelines only; it is not intended to provide specific procedures for

every type of installation.

If necessary, the information in this manual will be revised. Before attempting the installation procedures

presented in this manual, verify that you have a complete and up-to-date release of this document.

1. Illustration of Equipment

Figure INTRO-1 shows the SDU.

Figure INTRO-1. Satellite Data Unit

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Figure INTRO-2 shows the SCM.

Figure INTRO-2. SDU Configuration Module

2. Acronyms and Abbreviations

AES Aircraft Earth Station

AMSS Aeronautical Mobile Satellite Services

AORE Atlantic Ocean Region-East

AORW Atlantic Ocean Region-West

APAC Asia-Pacific

BIT Built-In-Test

BITE Built-In-Test Equipment

BSU Beam Steering Unit

CEPT Comite Europeen des Postes et Telecommunications

CTU Cabin Telecommunications Unit

DLNA Diplexer/Low-Noise Amplifier

DITS Digital Information Transfer System

EASA European Aviation Safety Agency

EMEA Europe, Middle East, and Africa

ESD Electrostatic Discharge

FAA Federal Aviation Administration

FAR Federal Aviation Regulation

FMS Flight Management System

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GES Ground Earth Station

GND Ground

HGA High Gain Antenna

HPA High Power Amplifier

ICA Instructions for Continued Airworthiness

ICAO lnternational Civil Aviation Organization

I/O Input/Output

IOR Indian Ocean Region

IRS Inertial Reference System

ISDN Integrated Services Digital Network

LES Land Earth Station

LRU Line Replaceable Unit

MCU Modular Concept Unit

MES Mobile Earth Station

MHz Megahertz

MOPS Minimum Operational Performance Standards

MPU Maintenance Port Utility

ORT Owner Requirement Table

POR Pacific Ocean Region

POTS Plain Old Telephone System

RF Radio Frequency

RMA Return Material Authorization

RTN Return

Rx Receive

SATCOM Satellite Communications

SBB SwiftBroadband (Inmarsat)

SCM SDU Configuration Module

SDU Satellite Data Unit

SLU Software Logical Unit

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3. Safety Advisories

Warnings, cautions, and notes in this manual provide the reader with the following information:

• A WARNING describes an operation, procedure, or condition that, if not obeyed, could cause injury or

death.

• A CAUTION describes an operation, procedure, or condition that, if not obeyed, could cause damage

to the equipment.

• A NOTE provides supplementary information or explanatory text that makes it easier to understand and

perform procedures.

All personnel who install, operate, and maintain the ARINC 781-500 SDU and SCM, and associated test

equipment must know and obey the safety precautions listed below. The procedures provided in this

manual assume that the person performing installation or maintenance tasks is familiar with and obeys

standard aviation shop and safety practices.

The general safety advisories include the following:

WARNING: RADIO FREQUENCY EXPOSURE. OCCUPATIONAL/CONTROLLED EXPOSURE LIMITS

APPLY IN SITUATIONS IN WHICH PERSONS ARE EXPOSED TO RADIO FREQUENCY

ENERGY AS A CONSEQUENCE OF THEIR EMPLOYMENT. THE RADIO SYSTEM

INTEGRATOR SHALL ENSURE OCCUPATIONAL WORKERS ARE FULLY AWARE OF

THE POTENTIAL FOR EXPOSURE AND ARE TRAINED TO EXERCSE CONTROL OVER

THEIR EXPOSURE AS REQUIRED IN THE FOLLOWING REFERENCES: FCC CFR 47,

PART 1.1310, PART 2, 1093; ·INDUSTRY CANADA RSS-102, HEALTH CANADA SAFETY

CODE 6; EUROPEAN DIRECTIVE 2004/40/EC.

WARNING: BEFORE HANDLING ANY UNIT OR COMPONENT, GROUND THE REPAIR OPERATOR

THROUGH A CONDUCTIVE WRIST STRAP OR OTHER DEVICE THAT USES A 470

KILOHM OR 1 MEGAOHM SERIES RESISTOR TO PREVENT INJURY.

CAUTION: TURN OFF POWER BEFORE DISCONNECTING ANY EQUIPMENT FROM WIRING.

DISCONNECTING THE EQUIPMENT WITHOUT TURNING POWER OFF MAY CAUSE

VOLTAGE TRANSIENTS THAT CAN DAMAGE THE EQUIPMENT.

STC Supplemental Type Certificate

TCP Tuning and Control Panel

Tx Transmit

USIM Universal Subscriber Identity Module

UUT Unit Under Test

VSWR Voltage Standing Wave Ratio

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CAUTION: THIS EQUIPMENT INCLUDES ITEMS THAT ARE ELECTROSTATIC DISCHARGE

SENSITIVE (ESDS) DEVICES. ESDS DEVICES ARE SUBJECT TO DAMAGE BY

EXCESSIVE LEVELS OF VOLTAGE AND/OR CURRENT. THE LOW-ENERGY SOURCE

THAT MOST COMMONLY DESTROYS ESDS DEVICES IS THE HUMAN BODY, WHICH,

IN CONJUNCTION WITH NONCONDUCTIVE GARMENTS AND FLOOR COVERINGS,

GENERATES AND RETAINS STATIC ELECTRICITY. TO ADEQUATELY PROTECT ESDS

DEVICES, THE DEVICE AND EVERYTHING THAT CONTACTS IT MUST BE BROUGHT

TO GROUND POTENTIAL BY PROVIDING A CONDUCTIVE SURFACE AND DISCHARGE

PATHS. USE STANDARD INDUSTRY PRECAUTIONS TO KEEP RISK OF DAMAGE TO A

MINIMUM WHEN TOUCHING, REMOVING, OR SERVICING THE EQUIPMENT.

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SYSTEM DESCRIPTION

This section includes basic information about the A781-500 system, including the following sections:

• Inmarsat System Overview

• Equipment Overview

• Equipment Specifications

• System Interfaces

• User Interfaces

• Software Description.

1. Inmarsat System Overview

This section provides an overview of the Inmarsat satellite communications system and networks.

Satellite communication systems provide users with long-range voice and data communication by

accessing global satellite and ground communications networks. Satellite communication systems

include global satellite networks, Land Earth Stations (LES), Ground Earth Stations (GES), Aircraft Earth

Stations (AES), and Mobile Earth Stations (MES).

The LES/GES is the part of the satellite communication system that is on the ground. These numerous,

international stations are responsible for routing voice and data calls from the MES/AES to their

destinations around the world. The MES/AES is the part of the satellite communication system that is on

the aircraft. GES and AES are the terms associated with Aero-H+ services. LES and MES are the terms

associated with other satellite communication services.

Inmarsat is an international organization that operates and maintains multiple geostationary satellites and

satellite networks (I-3 and I-4). For more information about I-3 and I-4 satellite beam coverage, refer to

the Inmarsat website—www.inmarsat.com.

I-3 satellites provide Inmarsat services for aviation (Aero H+ and Swift 64), shipping, and land-mobile

users. The satellites connect to ground telecommunication systems through a network of GESs. Each I-3

satellite is located over an Ocean Region (OR)—the current OR names are:

• Atlantic Ocean Region-East (AOR-E)

• Atlantic Ocean Region-West (AOR-W)

• Indian Ocean Region (IOR)

• Pacific Ocean Region (POR).

I-4 satellites provide worldwide SwiftBroadband (SBB service). Each I-4 satellite has 19 wide spot beams,

228 narrow spot beams, and is capable of accommodating many separate, simultaneous SBB sessions.

The SBB service and I-4 satellites support broadband applications. The current I-4 satellites are:

• AMERICAS

• EMEA (Europe, Middle East, and Africa)

• APAC (Asia-Pacific).

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The satellite communication avionics (A781-500 system), in conjunction with an antenna subsystem, act

as an AES/MES. The combined system provides users with a data and voice communications link to the

satellite network and global telecommunications system.

Figure 1-1 illustrates a simplified satellite communications system.

2. Equipment Overview

The A781-500 system, in combination with the antenna sub-system, provides Aeronautical Mobile

Satellite Services (AMSS) by facilitating airborne satellite communications over the Inmarsat network,

including the following services:

• Classic Aero-H+—Provides ACARS packet data services at 600, 1,200, or 10,500 bps over the PRT

channel combination and half-rate circuit switched voice service over the C channel. FAX data ser-

vices are not available over Classic Aero-H+.

• SwiftBroadband (SBB)—Provides AMBE+2 voice (circuit-switched) and broadband packet switched

services. The equipment can achieve aggregate rates of 432 kbps, but data rates may vary with net-

work load and signal quality.

Figure 1-1. Simplified Aeronautical Satellite Communications System

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The A781-500 system consists of the Satellite Data Unit (SDU) and the Satellite Data Unit Configuration

Module (SCM).

Figure 1-2 illustrates the A781-500 system.

a2 Figure 1-2. A781-500 Avionics System

A. SDU

The SDU is the central communications processing and control unit and largely determines the

functionality of the complete SATCOM system. It manages interfaces, routing and priorities, and call

channel establishment and tear down. SDU provides RF power amplification using an internal high

power amplifier.

The SDU is divided into several shop replaceable units that are electrically connected via the

backplane. Various SRUs are also connected using RF cables.

B. SCM

The SCM is an external peripheral of the SDU and provides a dedicated interface to the SDU. It

stores Secure and User ORTs. The SCM can accommodate up to four Universal Subscriber Identity

Modules (USIM) that store subscriber information for the SBB network.

By storing configuration information independent of the SDU, the SCM facilitates efficient SDU

replacement. A new SDU that replaces a faulty SDU does not require any configuration. All

configuration information is obtained from the SCM.

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The terms Secure ORT and User ORT are consistent with the industry terminology as defined in

the ARINC 781-4 Characteristic. For the Boeing aircraft, the following terms are used:

- Options Selection Software (OSS) = Secure ORT

- Airline Modifiable Information (AMI) = User ORT.

3. Equipment Specifications

This section includes the physical and environmental characteristics of the A781-500 SDU and SCM.

Table 1-1 provides a summary of the physical characteristics and equipment specifications of the SDU

component.

Table 1-1. SDU Physical Characteristics and Specifications

CHARACTERISTIC SPECIFICATION

Related Documents

ARINC characteristics ARINC 781 Mark 3 Aviation Satellite Communications

System

RTCA documents DO-160E, Environmental Conditions and Test

Procedures for Airborne Equipment

SCM Specifications

Physical size

Length 4.7 inches (11.94 cm)

Width 4.0 inches (10.16 cm)

Height 1.0 inch (2.54 cm)

Weight 1.0 pound (0.454 kg)

Mounting information 4 x 0.125" holes on 3.3" x 3.5" spacing, per attachment

1-6 of ARINC 781

Electrical interfaces

Power/control interface as per ARINC 781

Power requirements Powered by SDU

Table 1-3. ARINC 781-500 SDU and SCM ERTCA/DO-160E Environmental Characteristics

Section Environmental Condition Category

4.0 Temperature and Altitude A2

4.5.1 Ground Survival Low A2

4.5.2 Operating Low Ambient A2

4.5.3 Short Time Operating High A2

4.5.4 Operating High Ambient A2

4.5.5 In Flight Loss of Cooling A2

Ground Survival Low Temperature A2

Ground Survival High Temperature A2

4.6.1 Altitude A2

5 Temperature Variation B

6 Humidity A

7 Operational Shock and Crash Safety B

8.5.2 Vibration Standard – Random S, Curve B

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9.0 Explosive Atmosphere E

15 Magnetic Effect A

16.5.1.4 Power Input (AC) Interruptions A(WF)H

17 Voltage Spike A

18 Audio Frequency Conducted Susceptibility (AC) K

19 Induced Signal Susceptibility CWX

20 Radio Frequency Susceptibility RR

21 Emission of RF Energy M

22 Lightning Induced Transient Susceptibility ZZZZZ

24 Icing X

25 Electrostatic Discharge (ESD) A

Table 1-3. ARINC 781-500 SDU and SCM ERTCA/DO-160E Environmental Characteristics

Section Environmental Condition Category

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4. System Interfaces

This section describes the A781-500 system interfaces.

Figure 1-3 illustrates the block diagram of the A781-500 avionics system.

Figure 1-3. A781-500 Avionics System Block Diagram

NOTE: On the aircraft, only the Ethernet3 and 4-wire ports are supported.

A. SDU

The SDU is divided into the following LRUs:

• Channel cards (2)

Cha nnel Card 2

(DABC)

Cha nnel Card 1

(Sing le BGAN )

C hann el C ard

Pr oces sor 1

Clas sic

C han nel 1

P,R &T

Cha nnel Card

Proc esso r 2 A

ISDN TE

Data

Proce ssor

(DP)

ISDN

Ethernet

Spare

10 BT

FXS

(POTS )

FXS

(POT S )

CEPT -

Classic

4-W ir e

Et h 3

QU AD

10 /100

Eth 1

10BT

ISDN

Et h 4

QU AD

10/1 00

ISDN Eth

ISDN

Voice Processor

(VP)

Eth

SBB

4-Wire

SBB

C hann el C ard

Processor 2 B

Front

Pane l

10BT

Ser. Ser.

MCDU #3

MCDU #2

MCDU #1

CMU #2

781A

Ant, IF

DLNA

HPA

ISDN

Et h ernet Sw it ch 2

(ESW 2)

Et hern et

Switch 1

(ESW 1)

NIM

Eth

Et h 2

10 BT

C ontrol

Pr oc ess o r

TMS320

615

Data

Loader

Ser .

CMU #1

Audio Subsystem

Config

Straps

Read

Cct

CFDS

IRS #2

IRS #1

AES ID

DWO W

SCM

RF TxRF Rx

ISDN TE

Le ge nd

Control Pr ocessor Domain

Voice Processor D omain

Data Pr ocessor Domain

C hannel C ards

Inactive/D isabled Items

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• Control and data processor card

• Voice processor card

• High power amplifier

• ARINC backplane

• DIN backplane

• 10 MHz oven controlled crystal oscillator

• Power supply.

The major interfaces of the SDU are listed in Table 1-4.

B. SCM

The SCM does not provide any interfaces other than a dedicated interface to the SDU.

The SCM is powered by the SDU.

5. User Interfaces

This section describes the A781-500 SDU interfaces that enable users to access Inmarsat services and

monitor the operation of the A781-500 system.

NOTE: There are no user interfaces associated with the SCM.

Table 1-4. SDU System Interfaces

System Interface Description

ACU/BSU (x1) Antenna control unit/beam steering unit

TCP (x3) Tuning and control panel. Interconnected to the SDU

multi-purpose control and display port

ACARS CMU (x2) Aircraft communication addressing and reporting system

communication management unit

IRS (x2)/GPS (x1) Inertial reference system/global positioning system

SCM (x1) SDU configuration module

AES ID (x1) Aircraft Earth station identification

Servicing DE-9 front panel

Button Test Button front panel

RF Transmit/receive to the DLNA

Antenna subsystem ARINC 781 antenna subsystem

Miscellaneous ARINC discrete input, outputs, and configuration straps

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A. TCP

The TCP is a device that uses an ARINC 429 interface per ARINC 739, which lets you communicate

with individual instruments on an aircraft, including the flight management system, very high

frequency radio, and the SDU.

B. 4-Wire Audio

The SDU supports two 4-wire audio interfaces.

C. Ethernet

The SDU supports two Ethernet data interfaces.

D. Maintenance Port

The SDU is equipped with a maintenance port, located on its front panel. The maintenance port

provides the physical connection to a password-protected Maintenance Port Utility (MPU) that

provides a system interface for users or service personnel who need to monitor or troubleshoot the

system.

For more information on configuring the maintenance port, refer to "Connecting to the MPU" on

page 4-2.

E. LEDs

The front panel of the SDU has two LEDs to indicate unit status:

• One green LED labeled Power

• One red LED labeled Fault.

Table 1-5 provides information about the LED signals.

F. Self-Test Button

The front panel of the SDU has a recessed button labelled Test.

NOTE: The Test button is recessed behind a red protective cap. To press the button, use a small

and thin tool with no sharp edges. You will not be able to press the button in far enough with

just your finger.

Table 1-5. SDU LED Status

Power LED Status Fault LED Status Description of SDU Status

LED is on LED is off No fault detected

LED is on LED is steadily on as long as

the fault exists

LRU fault detected

LED is on Flashing at 1 Hz with a 50%

duty cycle while the fault

exists

System fault detected but not isolated

to the LRU

Alternating flashing of Power and Fault LEDs Self-test in progress

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• To reset the unit, press and hold the Test button for at least 5 seconds.

• To initiate self-test (when no LEDs are flashing), momentarily press the Test button.

• When the self test completes (power on or user initiated) the Power LED will illuminate steady

for a period of 60 seconds and then it will deactivate for the duration of operation.

NOTE: During initial power-up or self-test execution, a momentary press of the self-test

button is ignored.

The LEDs indicate the results of the self-test. Table 1-5 provides information about the meaning of

LED signals.

6. Software Description

All operating software meets RTCA/DO-178B Level D requirements.

The SCM does not contain any software. Only configuration parameters are stored in the SCM.

The SDU software is not partitioned. The software is modular and modules run on individual Software

Logical Units (SLUs) within the SDU:

• Each channel card has a single SLU.

• Control and Data Processor card has a Control SLU and a Data SLU.

• Voice card has a Voice SLU.

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SYSTEM OPERATION

The SDU is an integral component in an AES. Together with the SCM, DLNA, Antenna, and HGA subsystem, it

provides AMSS by facilitating airborne satellite communication services over the Inmarsat network. These

services comprise Classic Aero-H+ and SwiftBroadband (SBB).

The SCM is a dedicated peripheral of the SDU and stores aircraft specific installation configuration critical to the

operation of the AES.

This section provides basic information on using the A781-500 system.

1. Registering and Activating Terminals

Registering and activating the A781-500 system has the following steps:

• Obtaining System Addresses

• Choosing Service Providers

• Registering Terminals.

A. Obtaining System Addresses

ICAO: Obtain your ICAO address from your local aeronautical authority. Your service provider will

require this address when you register for Classic Aero service.

USIM: Obtain SIM card(s) from your service provider. Your service provider will also activate these

cards to enable SBB service. One SIM card is required per channel of SBB service.

B. Choosing Service Providers

Contact Inmarsat for an up-to-date list of Inmarsat Service Providers using the following contact

information:

Inmarsat

99 City Road, London

EC1Y 1AX

Tel: +44 20 7728 1000

Fax: +44 20 728 1044

Customer Care

Tel: +44 20 7728 1777

Fax: +44 20 7728 1142

Email: customer_care@inmarsat.com

Web address: www.inmarsat.com

C. Registering Terminals

Contact your Inmarsat service provider and ask for a registration for service activation of Aircraft

Earth Station form. With this form, you can register for SBB, and Aero H+ services. The services

available depend on your service provider.

To complete the registration form you need the following information:

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• Customer information (address and contact information)

• Service provider details (obtained from your ISP)

• System and terminal information (terminal type, manufacturer, model number, serial number of

terminal)

• ICAO 24 bit technical address for Aero H+ services

• Aircraft information (tail number, fuselage/airframe number, manufacturer and model, and

country of registration)

• List of services required (for example, Aero H+ data-2, SBB PS, and SBB CS services)

• IMEI and IMSI for SBB services, printed on splash screen during boot-up while connected to

the maintenance port.

NOTE: IMSI is also printed on the SCM label.

NOTE: IMEIs are printed differently on the front panel maintenance port splash screen from

the SATCOM SWIFT CONFIG page on the TCP. The 14 digit IMEI appears in both

places. However, on the SATCOM SWIFT CONFIG page on the TCP, it has a 15th

digit appended to it. This digit is a check bit to validate the IMEI number.

2. Using the A781-500 System

This section describes how to perform the following tasks:

• Operating the TCP

• Logging On and Off

• Accepting and Making Calls in the Cockpit

• Viewing BITE Information.

A. Operating the TCP

This section provides information about the TCP and its interfaces—output and input ports, the

screen, and the keyboard.screen and the keyboard.

(1) Screen

The TCP displays all data on the screen, as shown in Figure 2-1.

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Figure 2-1. TCP Screen

NOTE: The SAT PHONE 1/2 menu shown in Figure 2-1 is an example where classic (SAT-1) and

SBB (SAT-2) cockpit calls are supported. Depending on the secure ORT parameter

settings, the prompts “SAT-1” and “SAT-2” can be replaced to display any message limited

to five characters.

The top of the screen displays the title of the menu on the screen. The bottom of the screen

(Line 14) is the scratchpad that displays information that you enter on the keyboard.

The TCP has four buttons on each side of the screen that activate TCP functions. Figure 2-1

displays these buttons on the left and right sides of the screen. When the functions

corresponding to a button are available, the function is displayed beside the button.

Other lines on the TCP screen display information relevant to the function or status of the

A781-500 system.

When a button has an action associated, there will be either a < or > symbol beside it.

(2) Keyboard

The TCP’s keyboard includes a set of numeric keys and a set of alphabetic keys, both of

which you can use to enter data into the TCP.

The keyboard may include preset keys, such as the following:

•The IDX or MAIN MENU key: this key returns you to the TCP’s main menu.

•The CLR key: this key clears any text you type into the scratchpad.

•The NEXT PAGE key: this key brings up the next page of a menu if one is available.

•The PREV PAGE key: this key brings up the previous page of a menu if one is available.

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(3) Special Symbols

Because of space constraints on the screen, the TCP uses a number of special symbols to

indicate actions:

•< or > appears when there is an action associated with that key.

•NUMBER/NUMBER appears to tell you which page out of how many pages you are

viewing. For example, 1/3 would appear when you are on page 1 of 3 pages in total.

(4) Navigating the TCP

The TCP includes a number of menus, as shown in Figure 2-2.

Figure 2-2. A781-500 TCP Menu Structure

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B. Logging On and Off

Using the TCP, you can log on to the satellite network manually or automatically:

• Manual Logon—constrains the logon to use a satellite that you select

• Automatic Logon—logs on using the best available satellite as defined by the ORT.

If specified in the ORT, the initial system logon happens immediately after the

A781-500 system powers up, with no TCP input required. If the ORT is not configured as such, you

must initiate the logon from the TCP (MANUAL LOG-ON or AUTO LOG-ON command). For more

information, see "ORT Overview" on page 3-7.

You can watch the progress of the logon on the SATCOM LOG 1/2 menu, or simply wait until the

prompt on the SAT-PHONE 2/2 menu indicates the service is available for use.

(1) Logging On Automatically

When you initiate an automatic logon, the system selects a satellite and GES based on the

preferences specified in the ORT.

To log on automatically:

(a) On the SAT-PHONE 2/2 menu, press the button next to LOG.

The SATCOM LOG menu appears.

(b) On the SATCOM LOG menu, press the button next to AUTO LOG-ON.

If you return to the SAT-PHONE 1/2 menu, then the SAT-L and SAT-R channels are

updated with READY status after the logon completes.

NOTE: The TCP does not display the AUTO LOG-ON and MANUAL LOG-ON functions

when the A781-500 system is already logged on.

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NOTE: On the SAT-PHONE 2/2 menu, SAT-L shows the Classic Aero channel status

and SAT-R shows the SBB channel status. The A781-500 system logs on the

Classic Aero channels first, and then logs on the SBB channels.

(2) Logging On Manually

To log on manually, you must select a satellite and GES.

To log on manually:

(a) On the SAT-PHONE 2/2 menu, press the button next to LOG.

The SATCOM LOG menu appears.

(b) Press the button next to SATELLITE ID until the TCP screen shows the satellite ID to

which you want the A781-500 system to log on.

the A781-500 system to log on.

(d) On the SATCOM LOG menu, press the button next to MANUAL LOG-ON.

The TCP returns to the SAT-PHONE 2/2 menu and updates the SAT-L and SAT-R

channels with READY status after the log on completes.

NOTE: SAT-L shows the Classic Aero channel status and SAT-R shows the SBB channel

status. The A781-500 system logs on the Classic Aero channels first, and then

searches for SBB services on the satellite determined by the Classic Aero log-on.

(3) Logging Off Classic Aero Services

WARNING: THIS OPTION DOES NOT LOG OFF SBB OR SWIFT 64 SERVICES. IF EITHER

OF THESE SERVICES IS RUNNING, THEY WILL CONTINUE TO RUN AND

POTENTIAL CHARGES COULD BE MADE TO THE CABIN. TO COMPLETELY

LOG OFF, POWER DOWN THE A781-500 SYSTEM.

To log off:

(a) On the SAT-PHONE 2/2 menu, press the button next to LOG.

The SATCOM LOG menu appears.

(b) On the SATCOM LOG menu, press the button next to LOG-OFF.

The A781-500 system logs off the satellite network.

(4) Viewing Log Status

The log status defines whether the A781-500 system is logged on or logged off. Valid values

are shown in Table 2-1.

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To view log status:

(a) On the SAT-PHONE 1/2 menu, press the button next to LOG.

The SATCOM LOG menu appears.

(b) The log status appears on the line below STATUS.

C. Accepting and Making Calls in the Cockpit

You can make air-to-ground and air-to-air calls using the ARINC 781 system, the TCP, and one or

two four-wire headsets. You can manually dial calls or dial previously saved telephone numbers

from the TCP’s telephone directory.You can make air-to-ground and accept ground-to-air voice

calls using the A781-500 system, the TCP, the Audio Control Panel (ACP), and a four-wire cockpit

headset.

The four-wire cockpit headset supports Push to Talk (PTT) mode. Push to Talk mode mimics the

way an HF radio functions. The user's voice is only transmitted when the 'Mic On' input is asserted

i.e. grounded.

Table 2-1. A781-500 System Log Status

Log Status Description

SAFE MODE Configuration error detected

HSR NOT READY High stability oscillator is in a warming condition

AES ID NOT READY Displayed until a non-zero ICAO address is present

NAV DATA UNAVAIL Insufficient navigation data available

CC NOT READY Channel card has not fully booted

LOGGED OFF A781-500 system not logged on to the satellite network.

Awaiting input from the user

TUNING TO SAT Tuning and scanning for reception from the selected

satellite

DET SYS TABLE Updating the Satellite table

SPOT BEAM SEARCH Selecting the optimal spot beam

WAIT LOGON CONF Awaiting the logon confirmation from the satellite

WAIT LOGON ACK Awaiting for logon acknowledge from the GES

LOGGED ON Successfully logged on to GES

REJECT-TEMPORARY Logon rejected by the GES, but the condition is temporary

REJECT-PERMANENT Logon rejected by the GES, and the condition is

permanent

REJECT-INV PARAM Logon rejected by the GES due to invalid parameters, and

the condition is permanent

REJECT-AES INVAL ICAO address was not accepted by the GES, the

condition is permanent

LOGGING OFF Starting the logoff process

Note: For the 4 reject states, these statuses only stay on the display for 4 seconds.

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(1) Making Cockpit Calls

You can manually dial calls or dial previously saved telephone numbers from the TCP’s

telephone directory.

When the SDU cannot complete a call, the TCP displays CALL FAIL.The call and event logs

provide information about the cause of the call failure. Call and event logs are accessible to

avionics technicians through the maintenance port of the SDU.

(a) Making Calls from the Scratchpad

A call can only be initiated using the buttons on the TCP.

To make a call:

(1) Navigate to the SAT-PHONE 1/2 page.

(2) Enter a number in the TCP scratchpad using the following pattern.

00+CC+NNN+NUMBER (for calls within North America)

011+CC+NNN+NUMBER (for International calls)

where:

• 00 and 011 are access codes

• CC is the country code (Country Code may be up to 4 digits)

• NNN is the city or area code.

NOTE:

• You can enter up to 18 characters in the scratchpad (including hyphens), but the

maximum number of digits that can be dialed is 17.

• Hyphens are not necessary. If you wish to use hyphens, press the +/- key on the

scratchpad.

• To delete an incorrect character, press CLR on the scratchpad.

• To delete a number, press CLR on the TCP.

The number appears at the bottom of the TCP screen and MANUAL ENTRY

appears under the channel label.

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(3) Press the button next to MANUAL ENTRY.

NOTE: If an entry has MANUAL ENTRY under the SAT-1 label, that entry can be dialed

on Classic Aero channels. If an entry has MANUAL ENTRY under the SAT-2,

that entry can be dialed on SBB channels.

MAKE CALL and the number appear under the channel label.

1 5 10 15 20 24

1SAT ‐PHONE 1/2

SAT - 1 : READY PR IOR I TY

1L 3<MAKE CALL EMG> 31R

0016135916040

2L 5DIRECTORY>52R

PR I OR I TY

3L 7SBB PUB 73R

SAT - 2 : READY

4L 9<MANUAL ENTRY 94R

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(4) To set the priority, press the button next to PRIORITY.

Available priorities are as follows, all in order from highest to lowest.

• 1 EMERGENCY (EMG)—highest

• 2 OP-HIGH (HGH)

• 3 OP-LOW (LOW)

• 4 PUBLIC (PUB)—lowest.

NOTE: You can only set the priority for a Classic call. All calls made over SBB are

considered equal to public priority.

(5) On the TCP, press the button next to MAKE CALL.

The channel status displays DIALING, RINGING, and then ANSWERED when

connected.

(b) Making Calls from the Telephone Directory

You can make voice calls from the numbers you have saved in the TCP’s telephone

directory. Numbers can be saved in the telephone directory using the TCP or the ORT.

For more information on the ORT, see "ORT Overview" on page 3-7.

To make a call from the telephone directory:

(1) On the TCP main menu, press the button next to SAT.

(2) On the TCP keyboard, press the NEXT PAGE key to advance to the second page

of the SAT-PHONE menu, and then press the button next to DIRECTORY.

The SAT DIRECTORY INDEX menu appears.

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(3) To access phone numbers in a directory, press the key next to a directory name.

The SAT DIRECTORY page appears.

NOTE: If an entry has the < symbol in the SAT-L column, that entry can be dialed

on Classic Aero channels. If an entry has the > symbol in the SAT-R

column, that entry can be dialed on SBB channels. If there is no symbol,

the entry cannot be dialed on that channel.

(4) Press the button to the left or right of the number you wish to dial.

• Pressing the left button loads the number on the Classic Aero channel.

• Pressing the right button loads the number on the SBB channel.

The TCP returns to page one of the SAT-PHONE menu and the number is

displayed under the selected channel.

(5) To set the priority, press the button next to PRIORITY.

NOTE: You can only set the priority for a Classic call. All calls made over SBB are

considered equal to public priority.

(6) Press the button next to MAKE CALL.

The channel status displays DIALING, RINGING, and then ANSWERED when

connected.

To answer a call:

• On the ACP, transition the MIC ON discrete from ON HOOK to OFF HOOK.

1 5 10 15 20 24

1SA T D I R E C T OR Y 1 /2

SAT - 1 D IR2 SAT - 2

1L 3< ---FLIGHT DISPATCH---- 31R

001-719-555

‐5555

2L 5< ---MAINT WATCH-------->52R

001-206-555

‐5555

3L 7< ---ENGINEERING-------- 73R

001-425

‐555-7 777

4L 9<RETURN 94R

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On the TCP, press the button next to ANSWER to answer the call or press the button

next to REJECT to reject the call.

(d) Ending Calls

To end a call:

• On the TCP on the menu, press the button next to END CALL.

On the ACP, assert the Place/End switch.

(2) Call Priority

The A781-500 system has four priority settings for calls:

• 1 EMERGENCY (EMG)—highest

• 2 OP-HIGH (HGH)

• 3 OP-LOW (LOW)

• 4 PUBLIC (PUB)—lowest.

(a) Setting the Call Priority

You can set the priority for an air-to-ground four-wire Classic call before making the call.

This priority setting allows for preemption of existing lower priority Aero H+ calls if

insufficient satellite resources exist to establish an independent call, and for preemption

of calls and services within the cabin.

If the four-wire Classic call is the same priority as an existing call, the established call

will be retained and the new call will be queued.

Cockpit calls over SBB are Public priority calls. You can not change the priority.

All calls made from the interfaces other than the cockpit four-wire phones or ACARS

CMU are Public priority calls.

(b) Receiving a Priority Call

If a cockpit call is in progress and a higher priority ground-to-air call is received, the

higher priority incoming call will preempt the existing call. The preemption is automatic,

and the caller in the cockpit has no option to choose between calls.

(3) Saving Telephone Numbers in the Telephone Directory

You can save telephone numbers to the TCP’s telephone directory to use later, and you can

dial telephone numbers from the telephone directory.

NOTE: Saving telephone numbers in the directory may be inhibited by ORT options.

To save telephone numbers to the telephone directory:

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(1) Navigate to the SAT-PHONE 2/2 menu and press the button next to DIR DETAILS.

The SAT DIR DETAILS menu appears and shows directory page 1. There are 20

phone directories with five phone number entries available in each directory.

Use NEXT PAGE and PREV PAGE to navigate to the directory in which you want

to add or modify a phone number entry.

1 5 10 15 20 24

1SAT ‐PHONE 2/2

1L 3<LOG B I TE FA I L>

31R

2L 5<D I R DETA I LS CONF I G> 52R

3L 7SBB> 73R

4L 9 9 4R

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(2) To modify an entry, press the button next to the entry. To add a new entry, press the

button next to an empty line.

(3) Type the name associated with the telephone number in the scratchpad and then

press the button next to the name field on the TCP screen.

• The maximum number of characters for a name is 14.

(4) Enter a number in the TCP scratchpad using the following pattern.

00+CC+NNN+NUMBER (for calls within North America)

011+CC+NNN+NUMBER (for International calls)

where:

• 00 and 011 are access codes

• CC is the country code (Country Code may be up to 4 digits)

• NNN is the city or area code

NOTE:

• You can enter up to 18 characters in the scratchpad (including hyphens), but the

maximum number of digits that can be dialed is 17.

• Hyphens are not necessary. If you wish to use hyphens, press the +/- key on the

scratchpad.

(5) Press the button next to the phone number field on the TCP screen.

(6) Press the button next to PRIORITY to select a priority for the phone number.

(7) To save the entry, press the button next to STORE. To cancel the new entry, press

the button next to CANCEL.

(8) Press the button next to CONFIRM.

The entry is saved.

NOTE: You can protect directory entries using the Phonebook ORT parameter. If

an entry is protected, it cannot be modified or deleted. For more

information about the Phonebook ORT parameter, refer to "ORT

Overview" on page 3-7.

D. Viewing BITE Information

From the SATCOM BITE menu, you can view BITE information to determine subsystem health.

To view BITE information:

(a) On the TCP main menu, press the button next to SAT.

(b) On the TCP keyboard, press the NEXT PAGE key to advance to the second page of the

SAT-PHONE menu, and then press the button next to SATCOM BITE.

The SATCOM BITE menu appears.

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You can view the following information from this screen:

• SDU status on the line below SDU

• Overall health of all subsystem components (SCM, DLNA, and HGA) on the line below

SUBSY HLTH

• Thermal status of the SDU and HGA on the line below OVERTEMP

• SCM health on the line below SCM

• Peripheral LRU bus status on the line below SYS BUS

1 5 10 15 20 24

1 SATCOM B I TE STATUS2/2

1L 3<SCM RF PATH> 31R

OK OK

2L 5 US IM/DATA> 52R

1/1 1

3L 7 73R

4L 9<RETURN 94R

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• Subsystem bus status on the line below SUBSY BUS

• The number of functional channels followed by the number of installed channels on the

line below CHANNELS

• The number of functioning SBB channels and Classic channels below CH-SBB CLSC

• RF path status on the line below RF PATH

• USIM and data bus status on the line below USIM/DATA.

NOTE: Valid values for status are OK and FAIL. If the status of a subsystem is FAIL, press

the button next to the subsystem to view the details.

To view more information about the health of a particular subsystem, press the button next to the

name of the subsystem. For more information about the various TCP menu screens, see

"Troubleshooting and Fault Isolation" on page 4-8.

3. Channel Status and System Configuration

A. SBB Status

As shown in Figure 2-3, the SBB menu provides information about the status of the SBB service.

Figure 2-3. SBB Menu

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Table 2-2 describes the information available in the SBB menu.

Table 2-2. SBB Menu

Label Description

Status The status of the SBB channel. Possible values are:

• HSR NOT READY—high stability oscillator is warming

• USIM WARMING—USIM is warming

• NOT READY—channel card has not yet started

registration, and may be waiting on the Classic card

• ATTACHING—satellite identified and attach has begun

• CS ATTACH—attach complete, circuit-switch granted

• PS ATTACH—attach complete, packet-switch granted

• CSPS ATTACH—attach complete, circuit-switch and

packet-switch granted

• ATTACH-FAIL— attach failed, with the 3GPP cause code

• NOT READY—selected satellite does not support SBB

• DISABLED—selected SBB service is not configured in the

operational mode

Satellite The selected ocean region.

Activity The activity status of the SBB service. Possible values are:

• CS CONNECT—Circuit Switched services in use

• PS CONNECT—Packet Switched services in use

• CSPS CONNECT—Circuit Switched services and Packet

Switched services in use

• NONE —No services in use

Signal The current signal quality.

EIRP The EIRP setting of the channel.

Beam ID The current beam ID for the service.

Elevation The computed elevation angle for the antenna pointing

vector.

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B. Channel Information and Bit Errors

As shown in Figure 2-4, the SATCOM LOG 2 menu provides information about the current channel

and the bit error rate.

Figure 2-4. SATCOM LOG 2 menu

Table 2-3 describes the information available in the SATCOM LOG 2 menu.

C. System Part Numbers

As shown in Figure 2-5, the SATCOM CONFIG 1 menu provides the hardware part numbers of the

SDU and the SCM.

Table 2-3. SATCOM LOG 2 Menu

Label Description

Channel # Channel number representation of the P channel, displayed

only when the SDU is logged on, otherwise the display is

blank.

Bit Errors The raw bit error rate.

ICAO The current ICAO address.

Doppler The doppler correction.

1 5 10 15 20 24

1SATCOMLOG  2/2

CHANNEL # DOPPL ER

1L 314008 -1999HZ 31R

B I T ERRORS

2L 5052R

ICAO

3L 701234567 73R

4L 9<RETURN 94R

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SFigure 2-5. SATCOM CONFIG 1 Menu

Table 2-4 describes the information available in the SATCOM CONFIG 1 menu.

Table 2-4. SATCOM CONFIG 1 Menu

Label Description

Hardware Part Number Part number of the A781-500 SDU.

Serial Number Serial number of the A781-500 SDU.

PROT Level Code This code is displayed if the SATCOM CONFIG menu is

accessed from the In-Flight menus. It allows access to the

Maintenance Mode TCP menus. Contact RC Product

Support for the PROT level code.

1 5 10 15 20 24

1 SATCOM CONFIG

1/5

HARDWARE PART NUMB ER

1L 3 822 -2556 -XXXXXX 31R

SERIAL NUMBER

2L 5 147206XXXXX 52R

3L 7 73R

PROT L EV EL CODE

4L 9<RETURN XXXX> 94R

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As shown in Figure 2-6, the SATCOM CONFIG 2 menu provides the software part numbers of the

equipment in the A781-500 system.

Figure 2-6. SATCOM CONFIG 2 Menu

Table 2-5 describes the information available in the SATCOM CONFIG 2 menu.

As shown in Figure 2-7, the SATCOM CONFIG 3 menu provides the software numbers of the

Secure ORT and the User ORT.

Table 2-5. SATCOM CONFIG 2 Menu

Label Description

Software Location ID TBD

SW Part Number SDU

OPS Software part number of the operational software in the

A781-500 SDU.

1 5 10 15 20 24

1 S AT COM CONF I G

2/5

SOFTWARE LOCAT ION ID

1L 3 LSXXXXXXX 31R

SW LOC ID DESCR I PT ION

2L 5 SATCOM 52R

SW PAR T NUMBER OPS

3L 7 COLCC -SSSS- SSSS 73R

4L 9<RETURN 94R

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Figure 2-7. SATCOM CONFIG 3 Menu

Table 2-6 describes the information available in the SATCOM CONFIG 3 menu.

As shown in Figure 2-8, the SATCOM CONFIG 4 menu provides the hardware part number and

serial number of the antenna in the A781-500 system.

Figure 2-8. SATCOM CONFIG 4 Menu

Table 2-6. SATCOM CONFIG 3 Menu

Label Description

SW Part Number OSS Software part number of the Secure ORT (OSS)

SW Part Number AMI Software part number of the User ORT (AMI)

1 5 10 15 20 24

1 S AT COM CONF I G

3/5

SW PART NUMB ER OSS

1L 3 COLCC -SSSS- SSSS 31R

SW PART NUMB ER AM I

2L 5 COLCC -SSSS- SSSS 52R

3L 7 7

4L 9<RETURN 94R

1 5 10 15 20 24

1 SATCOM CONFIG

4/5

SATELLITE HGA

1L 3 HARDWARE PART N UMB ER 3 1R

xxxxxxxxxxxxxxxx

2L 5 SERIAL NUMBER 5 2R

xxxxxxxxxxxxx xxx

3L 7 73R

4L 9<RETURN 94R

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Table 2-7 describes the information available in the SATCOM CONFIG 4 menu.

As shown in Figure 2-9, the SATCOM CONFIG 5 menu provides the hardware part number and

serial number of the SCM.

Figure 2-9. SATCOM CONFIG 5 Menu

Table 2-8 describes the information available in the SATCOM CONFIG 5 menu.

Table 2-7. SATCOM CONFIG 4 Menu

Label Description

Hardware Part Number Hardware part number of the HGA

Serial Number Serial number of the HGA

Table 2-8. SATCOM CONFIG 5 Menu

Label Description

Hardware Part Number Hardware part number of the SCM

Serial Number Serial number of the SCM

1 5 10 15 20 24

1 SATCOM CONFIG

5/5

SDU CONF I G MODUL E

1L 3 HARDWARE PART N UMB ER 3 1R

P / N RECE I VED FROM SCM

2L 5 SERIAL NUMBER 5 2R

S / N RECE I VED FROM SCM

3L 7 73R

4L 9<RETURN 94R

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4. Maintenance Mode

The maintenance menus of the TCP provide the same configuration and BITE information available in

In-Flight mode, and provide access to the PIM test, audio configuration, and other options and

parameters.

Maintenance mode includes a number of TCP menus, as shown in Figure 2-10.

Figure 2-10. Maintenance Mode TCP Menu Structure

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A. Accessing Maintenance Mode

You can only access the TCP maintenance menus when the plane is on the ground and classic

services are logged off.

To access the maintenance menus:

1. In the SATCOM CONFIG 1/4 menu, type the protection level code in the scratchpad, and press

the button next PROT LEVEL CODE.

NOTE: Contact RC Product Support for the PROT level code.

The TCP displays the MAINTENANCE ENTRY page.

To enter Maintenance Mode, press the button next to CONFIRM.

The SATCOM MAINT MENU appears.

1 5 10 15 20 24

1MA I NTENANCE ENTRY

1L 3 THIS WILL REQUIRE 31R

SATCOM TO COLDSTART

2L 5UPON EX I TI NG MAI NT PAGES52R

NOTE : OTHER A CT I VE TCPS

3L 7CENTER TC P 73R

RI GH T T C P

4L 9<CANCEL CONF IRM

>94R

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B. Viewing BITE Information

The BITE information available in maintenance mode is the same as the BITE information available

in In-Flight mode. For information about the BITE menus, see "Viewing BITE Information" on page

2-14.

C. Starting the Intermod Test

For information and instructions about running the PIM test, see "PIM Test" on page 3-8.

D. Viewing Configuration

The configuration menus available in maintenance mode are the same as the configuration menus

in In-Flight mode. For information about these menus, see "System Part Numbers" on page 2-18.

E. Viewing SATCOM Parameters

As shown in Figure 2-11, the SATCOM PARMS menu provides information about logon, fallback,

and the channel cards.

1 5 10 15 20 24

1 SATCOM MA INT M

ENU 1/2

1L 3<INTERMOD TEST OPTIONS

>31R

2L 5PARMS>52R

3L 7AMI RESTORE>73R

4L 9 RESUME>94R

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Figure 2-11. SATCOM PARMS

1 5 10 15 20 24

1SATCOM PARMS 1/2

L OGON MODE SDU/ AN T

1L 3<AUTO 2.0 31R

DD / MM / YY

2L 523 / 07 /14 52R

TIME

3L 71354 73R

4L 9<RETURN 94R

1 5 10 15 20 24

1SATCOM PARMS 2/2

1L 3 1 CHAN CARD 31R

SBB*

2L 5 5 2R

2 CHAN CARD

3L 7CLSC VO I CE / DATA * 73R

4L 9<RETURN 94R

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Table 2-9 describes the information available in the SATCOM PARMS menu.

F. Viewing SATCOM Options

As shown in Figure 2-12, the SATCOM OPTIONS menu provides information about audio and

phone operation.

Figure 2-12. SATCOM OPTIONS

Table 2-10 describes the information available in the SATCOM OPTIONS menu.

Table 2-9. SATCOM PARMS Menu

Label Description

LOGON MODE AUTO or MANUAL

DD/MM/YY Current date

TIME Current time

SDU/ANT Estimated loss between the SDU and antenna

CHAN CARD1 SBB

CHAN CARD2 CLSCVOICE/DATA

Table 2-10. SATCOM OPTIONS Menu

Label Description

CHIME-A2G Value of the CHIME A2G ORT parameter.

CALLED PARTY Display mode selection for call placement.

MANUAL DIAL Current state of the scratchpad number entry control.

1 5 10 15 20 24

1SAT COM OP T I ONS

1L 3 3 1R

CH IME - A2G CALLED PARTY

2L 5ALWAYS NAME> 52R

MA N U A L D I A L

3L 7<CONF IG AUD IO ALWAYS>73R

4L 9<RETURN 94R

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G. Configuring Audio Options

As shown in Figure 2-13 and Figure 2-14, the SATCOM CONFIG AUDIO menu provides

information and settings for cockpit phone operation.

Figure 2-13. CONFIG AUDIO 1/2

Table 2-11 describes the information available in the SATCOM CONFIG AUDIO 1 menu.

Table 2-11. SATCOM CONFIG AUDIO 1 Menu

Label Description

AUDIO LINE Switch between four-wire 1 and four-wire 2.

SPEAKER Headset speaker level—0 to 100.

MICROPHONE Microphone level—0 to 100.

SIDETONE Sidetone level—0 to 100.

NOISE Headset speaker noise level—0 to 100.

1 5 10 15 20 24

1SATCOM CONFIG AUDI O 1/2

AUDI OLI NE

1L 3 4-WIRE 1>3 1R

2L 5 SPEAKER 100 52R

M I CROPH ONE 5 0

3L 7SI DETONE 5 0 73R

NO I SE 5 0

4L 9<RETURN 94R

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Figure 2-14. CONFIG AUDIO 2/2

Table 2-12 describes the information available in the SATCOM CONFIG AUDIO 2 menu.

Table 2-12. SATCOM CONFIG AUDIO 2 Menu

Label Description

AUDIO LINE Switch between four-wire 1 and four-wire 2.

PUBLIC CALLS Displays the value of the Ground Initiated Public Call Routing ORT parameter.

This parameter enables the placing and acceptance of public calls via the

analog audio lines.

TERMINAL ID The terminal ID for the selected audio line interface.

PRIORITY The priority of calls allowed via the selected audio interface. The possible values

are:

•COCKPIT

•PUBLIC

•ALL

1 5 10 15 20 24

1SATCOM CONFIG AUDI O 2/2

AUDI OLI NE

1L 3 4-WIRE 1>3 1R

PUBLIC CALLS PRIORITY

2L 5ENABLED ALL 52R

TERMINAL ID

3L 7173R

4L 9<RETURN 94R

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INSTALLATION

This section describes the procedures required to install the A781-500 system (SDU and SCM) on an aircraft,

including the following sections:

• Advisories

• Pre-Installation Inspection

• Installation Procedure

• Connection Details

• Owners Requirements Table (ORT)

• Passive Intermodulation (PIM) Test

• Installation and Engineering Drawings

1. Advisories

Before performing any installation procedures, read the safety advisories listed in the Introduction on page

INTRO–4 of this manual.

2. Pre-Installation Inspection

Before installing any A781-500 system, conduct a pre-installation inspection of all parts to make sure that

no damage occurred during shipping.

A. Unpacking and Inspecting Equipment

• Unpack the A781-500 equipment from the shipping containers.

• Verify that the part number displayed on the shipping box and equipment component matches

the model and part number ordered. If components are missing from the shipment, contact the

supplier immediately and report the problem.

• Visually inspect the A781-500 equipment for any shipping damage. If any shipping damage has

occurred, contact the shipping carrier immediately and report the problem.

• Check the A781-500 equipment connectors for corrosion and damage. If damage is noted, do

not apply power to the equipment. Contact the supplier immediately to report the problem.

B. Cabling Notes

Before proceeding with the installation of the A781-500 system, read all cabling notes provided on

the Interconnection and Contact Assignment drawings.

3. Installation Procedure

Only authorized technical personnel, trained in general aviation workmanship, that have a basic

understanding of SATCOM systems should proceed with the following procedure.

Before performing any installation procedures, read the safety advisories listed in "Safety Advisories" on

page INTRO-4 of this manual.

CAUTION: THE A781-500 SYSTEM REQUIRES CONDITIONED AIR PER ARINC781.

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1. Install the SDU in a 6 MCU tray as per ARINC 600. The minimum clearance between the SDU and

any other equipment installed above it shall be no less than 0.5 inches (12.7 mm).

2. Install the SCM in any orientation. Refer to Table 1-2 on page 5 for the SCM mounting specification.

• There are no clearance requirements for the SCM.

3. Connect the SCM to the SDU. The SDU supports one RS-422 interface for interconnect to the SCM.

4. Connect the SDU to the antenna subsystem. The SDU supports ARINC 429 communication to and

from the antenna subsystem.

5. Connect the SDU to the TCP(s). The SDU supports three ARINC 429 receive interfaces and one

ARINC 429 transmit interface for interconnect to the flight deck TCP(s).

4. Connection Details

A. SDU

The SDU uses two external interface connectors:

• Rear Connector—a low insertion force, size 2 shell receptacle accommodating coaxial and sig-

nal interconnections in the top plug insert, Quadrax and signal connections in the middle plug

insert, and coaxial and power interconnections in the bottom plug insert. Pin assignments are

compliant with ARINC Characteristic 781 with top plug and middle plug deviations as shown in

Table 3-1.

• Front Connector—an RJ45 and 9S DSUB connector providing 10BaseT Ethernet interfaces

and an RS-232 maintenance interface. Pin assignments are shown in Table 3-2. The front

connector is behind a maintenance cover. This connector provides access to maintenance and

troubleshooting information when the SDU is not in normal operation.

Table 3-1. SDU Rear Connector Pin Deviations

Pin Number A781 Deviation

TP01C ATE pin 3 Data I/O Processor Maintenance GND

TP01D ATE pin 4 Data I/O Processor Maintenance TXD

TP01E ATE pin 5 Data I/O Processor Maintenance RXD

TP01F ATE pin 6 CC1 Processors #1 & #2 Maintenance GND

TP01G ATE pin 7 CC1 Processor #1 Maintenance TXD

TP01H ATE pin 8 CC1 Processor #1 Maintenance RXD

TP01J ATE pin 9 CC1 Processor #2 Maintenance TXD

TP01K ATE pin 10 CC1 Processor #2 Maintenance RXD

TP02A ATE pin 11 Shopload

TP02C ATE pin 13 Voice Processor Maintenance GND

TP02D ATE pin 14 Voice Processor Maintenance TXD

TP02E ATE pin 15 Voice Processor Maintenance RXD

TP02F ATE pin 16 CC2 Processor Maintenance GND

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Figure 3-1 shows the top plug pin deviations outlined in gray.

Top Plug Insert Pin Deviations

TP02G ATE pin 17 CC2 Processor 2A Maintenance TXD

TP02H ATE pin 18 CC2 Processor 2A Maintenance RXD

TP02J ATE pin 19 CC2 Processor 2B Maintenance TXD

TP02K ATE pin 20 CC2 Processor 2B Maintenance RXD

TP03A Ethernet Ethernet speed, 10Base-T

TP03B Ethernet Ethernet speed, 10Base-T

TP03C Empty Cavity SPARE

TP04A Ethernet Ethernet speed, 10Base-T

TP04B Ethernet Ethernet speed, 10Base-T

TP04C Empty Cavity SPARE

TP05A Empty Cavity SPARE

TP05B Empty Cavity SPARE

TP05C Empty Cavity SPARE

TP06A Ethernet Ethernet speed, 10Base-T

TP06B Ethernet Ethernet speed, 10Base-T

TP06C Empty Cavity SPARE

TP07A Ethernet Ethernet speed, 10Base-T

TP07B Ethernet Ethernet speed, 10Base-T

TP07C Empty Cavity SPARE

Middle Plug Insert Pin Deviations

MP05F Spare Discrete Reserved for future use.

MP07C Spare Discrete Flight Deck Data Load

Table 3-1. SDU Rear Connector Pin Deviations

Pin Number A781 Deviation

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Figure 3-1. Top Plug Pin Deviations

Figure 3-2 shows the mid plug pin deviations outlined in gray.

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Figure 3-2. Mid Plug Pin Deviations

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B. SCM

The SCM uses a 15-pin D-type male connector and locking screws. Pin assignments are compliant

with ARINC Characteristic 781 and shown in Table 3-3.

Table 3-2. SDU Front Connector DSUB and RJ45 Pin Assignment

9S DSUB Pin Number Description RJ45 Pin Number Description

1NC1RX+

2TX2RX-

3RX3TX+

4NC4NC

5GND5 NC

6NC6TX-

7NC7NC

8NC8NC

9NC

Table 3-3. SCM D-Type Connector Pin Assignment

Pin Number Description

1 Data to SDU A (RS422)

2 Data to SDU B (RS422)

3 Data from SDU A (RS422)

4 Data from SDU B (RS422)

5 Reserved - RS232 Gnd (used for shop loading)

6Spare

7 Chassis Ground

8 Power Input +8 V to +15 V

9 Reserved - Enable RS232 (used for shop loading)

10 Reserved - 0 V strap output (used for shop loading)

11 Spare

12 Reserved - RS232 Tx (used for shop loading)

13 Reserved - RS232 Rx (used for shop loading)

14 Spare

15 Power Return 0 V

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5. Owners Requirements Table (ORT)

A. ORT Overview

The A781-500 system includes a secure and user ORT. Secure ORT files must be certified for the

aircraft type on which the equipment is installed. Items in user ORT files can be modified by

individual customers and may be customized to an individual aircraft.

You can change secure ORT parameters only by uploading an ORT file. To obtain a secure ORT

file, contact RC Product Support.

The ORT file is loaded on to the SCM using an ARINC 615A data loader. You can only load ORT

data when the aircraft is on the ground and the data load discrete is asserted. When the SDU boots,

it compares the ORT file in its memory to that in the SCM. If the ORT files do not match, the SDU

loads the file from the SCM into its memory.

Some user ORT parameters can be modified in the SDU ORT. You can reset the SDU ORT to the

default values stored in the SCM in the maintenance menus.

To modify the user ORT parameters, use the ORT Application. To obtain the ORT Application,

contact RC Product Support.

For more information see the following guides:

• Publication No. D201511000062, A781-500 User ORT User Guide

• Publication No. D201511000064, A781-500 Secure ORT User Guide

• Publication No. D201511000061, A781-500 ORT Application Install Manual.

6. Passive Intermodulation (PIM) Test

This section describes the passive intermodulation test. You must execute the PIM test after installation

if the A781-500 SDU operates in SBB mode.

A. Overview

To meet Inmarsat requirements for SBB operation, the A781-500 SDU can test for passive

intermodulation effects. The PIM test verifies that the transmit signal from the A781-500 SDU does

not degrade or interfere with the receive signals as a result of PIM.

A781-500 SDU can only perform the PIM test when the aircraft is on the ground.

When the A781-500 SDU logs on to the SBB network, the network assigns the terminal two

channels for PIM testing. These channels are not used by other terminals so that the A781-500

SDU can transmit the test frequencies without interfering with other satellite communication

equipment or the Inmarsat satellite.

B. PIM Requirements

In order to successfully perform the PIM test, the aircraft and the satellite communication system

must meet the following requirements:

• The A781-500 SDU must have successfully logged on to a satellite that is visible at the test

location within the last 168 hours (7 days).

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• The aircraft has to be outside the hangar and far away from the hangars and towers in order to

obtain good results.

• The aircraft must be facing due north in the northern hemisphere, and due south in the south-

ern hemisphere.

C. PIM Test

To run the PIM test, you must be in maintenance mode.You can only access the TCP maintenance

menus when the plane is on the ground and classic services are logged off.

To start the PIM test:

(a) In the TCP CONFIG 1/5 menu, type the protection level code in the scratchpad, and

press the button next to PROT LEVEL CODE.

NOTE: Contact RC Product Support for the PROT level code.

The SATCOM Maintenance Entry page appears.

(b) To enter maintenance mode, press the button next to CONFIRM.

The MAINTENANCE MENU appears.

(d) Press the button next to RUN in order to initiate the PIM test.

The PIM test starts. The test takes about 5 minutes.

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D. PIM Test Results

Table 3-4 displays possible PIMBIT status messages. The status messages are displayed on the

INTERMOD page.

Table 3-4. PIM Test Conditions

Test Status Description Action

READY Conditions necessary to perform test

are present, no test is in progress and

no test has been run to completion.

No action required.

IN PROGRESS Test is in progress. No action required.

PASS Test has completed successfully and

passed the ORT specified criteria.

No action required.

FAIL Test has completed but does not

meet pass with the ORT specified

criteria.

See "PIM Test Overall Status" on

page 3-10.

SUSPECT Test results are suspect (possible

causes are: unstable noise,

mismatched test frequencies).

Repeat the test.

HSR NOT READY High stability oscillator is warming. Wait for the status to change to

READY.

NAV DATA UNAVAIL Test cannot be executed as

navigation information is not present.

SDU is in safe mode. Navigation

data must be provided in order for

the SATCOM system to work,

including PIMBIT. Ensure the SDU

can receive navigation data. Wait for

the status to change to READY and

repeat the test.

ANT NOT READY Test cannot be executed as

communication with Antenna has not

been established. This could indicate

an Antenna or D/LNA fault.

Problem with the antenna. PIMBIT

cannot be executed until

communication with the antenna is

established. Check the cable

connections of the SDU and the

antenna and check the antenna

status. "BITE" on page 4-6. Once the

connection has been established,

wait for PIMBIT status to change to

READY and run PIMBIT.

SDU FAULT Self test has found internal SDU fault. Check BITE status. See "BITE" on

page 4-6.

TEST FREQ UNAVAIL No test frequencies less than 168

hours old available for a viable

satellite.

Log on to an I-4satellite to obtain test

frequencies from the SBB bulletin.

Log off, ensure the status changes to

READY and run PIMBIT.

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(1) PIM Test Overall Status

At the end of the PIM test, the A781-500 SDU displays the test results on the TCP screen.

The TCP displays the overall PIM status and results for each direction. If the overall status is

PASS, the SDU can continue to use SBB services.

If the overall status is FAIL:

• Check the cable connections of the antenna and the SDU.

• Check the direction in which the test failed and verify that the antenna is not blocked in

that direction. Refer to "Directional PIM Test Results" on page 3-10.

(2) Directional PIM Test Results

The SDU performs the PIM test with the antenna pointing in different directions and displays

the results of the test in each direction. If the overall status of the PIM test is FAIL, you can

check the specific directions in which the test failed.

For each direction, the PIM test results provide:

• Overall Status—pass or fail

• The direction coordinates

• The signal degradation—pass level is adjustable in Secure ORT

• Possible interference—interference caused by environmental factors, not the SDU

transmit frequencies. Interference indicates that the SDU received a signal in the receive

band even when it wasn’t transmitting, therefore an external signal may be interfering

with communication in that direction

• Signal and noise levels before and after the test—the SDU uses this information to check

for possible interference.

SAFE MODE Configuration error detected.

Possible causes:

• Strapping parity error.

• FMPA messages when

standalone mode strapped.

• Secure ORT parameters are not

available.

SATCOM cannot operate until

configuration fault is eliminated (see

description for possible causes).

Once the fault is eliminated, wait for

the status to change to READY and

run PIMBIT.

NOT ALLOWED IN AIR Air/Ground status indicates in air.

PIMBIT cannot be performed while

the aircraft is in the air.

Run PIMBIT when the aircraft is on

the ground.

Table 3-4. PIM Test Conditions

Test Status Description Action

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7. Installation and Engineering Drawings

This section contains the Outline and Installation diagrams, and Interconnection and Contact Assignment

drawings for the SDU and SCM.

All foldout pages are odd-numbered and not-backed for print production purposes.

A. Outline and Installation Drawings

The Outline and Installation drawings on Page 3-23 thru Page 3-28 show the physical

characteristics of the SDU and SCM, and provide installation data for the system.

B. System Interconnect Drawings

System Interconnect drawings on Page 3-13 thru Page 3-22 show the interconnection details for

the SDU and SCM.

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Figure 3-3. A781-500 SDU Outline and Installation Drawing, PN 90402752 (Sheet 1 of 3)

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Figure 3-4. A781-500 SDU Outline and Installation Drawing, PN 90402752 (Sheet 2 of 3)

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Figure 3-5. A781-500 SDU Outline and Installation Drawing, PN 90402752 (Sheet 3 of 3)

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Figure 3-6. A781-500 SCM Outline and Installation Drawing, PN 90404776 (Sheet 1 of 2)

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Figure 3-7. A781-500 SCM Outline and Installation Drawing, PN 90404776 (Sheet 2 of 2)

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Figure 3-8. A781-500 System Interconnect Drawing, PN 90402748 (Sheet 1 of 3)

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Figure 3-9. A781-500 System Interconnect Drawing, PN 90402748 (Sheet 2 of 3)

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Figure 3-10. A781-500 System Interconnect Drawing, PN 90402748 (Sheet 3 of 3)

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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL

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TESTING AND FAULT ISOLATION

This section provides test procedures to determine the operational readiness of SDU units.

All of the tests are to be performed when the SDU is installed on an aircraft and connected to a TCP.

There are no operational test procedures defined for the SCM. SCM health is determined by accessing the SDU

BITE information.

If the A781-500 equipment passes all tests in this section but does not function according to the installation

requirements, the fault may be with equipment or wiring outside the A781-500 system.

This section includes:

• Operational and Diagnostic Testing

• Troubleshooting and Fault Isolation

• Adjustment/Alignment Procedures

• Modification History.

NOTE: Depending on the version of software installed, the MPU menus described may differ from those shown

as examples in this manual.

1. Operational and Diagnostic Testing

This section includes the following sections:

• General

• Test and Fault Isolation Equipment Requirements

• SDU Maintenance Port Utility

• Operational and Diagnostic Test Procedures.

A. General

The A781-500 system requires testing for one of the following reasons:

• To verify the operational readiness of the system after installation on an aircraft

• To verify that a fault exists and produce system reports for troubleshooting purposes

• To verify the operational readiness of repaired LRUs after re-installation on an aircraft.

This section includes test and fault isolation procedures for the A781-500 system. All test and load

procedures require the A781-500 SDU MPU, which is accessed by connecting to the maintenance

port of the SDU.

B. Test and Fault Isolation Equipment Requirements

Table 4-1 lists the equipment required to access the SDU Maintenance Port Utility and perform

operational and diagnostic testing on the SDU.

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C. SDU Maintenance Port Utility

This section describes the SDU MPU and provides the connection and cabling details required to

access and use the program.

(1) Connecting to the MPU

The MautoPU provides a system interface for fault isolation and diagnostic procedures.

To use the SDU MPU:

(a) Using a 3/32 Allen key, remove the maintenance port cover.

(b) Connect an RS-232 and VT-100 terminal (computer operating a terminal emulation

program) to the RS-232 maintenance port interface of the SDU.

The maintenance port on the front panel of the SDU provides a direct connection to the MPU

using a DB9 connector.

Figure 4-1 provides cabling details for the SDU maintenance port.

Figure 4-1. Maintenance Cable

Table 4-1 List of Required Test Equipment

Item Equipment Specification Quantity

Computer Standard PC running VT-100 terminal emulator,

such as Hyper Terminal and equipped

with an RS-232 port.

VT-100 terminal

emulation program

equivalent

Serial communication program using an

RS-232 port

Cable RS-232 cable Maximum length 25 feet 1

Allen key Standard 3/32 inch Allen key to fit a hex screw with

a 4/40 inch head.

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(a) Interface Requirements

A standard VT-100 compatible terminal running an emulator program (such as

HyperTerminal, ProComm Plus, or similar) provides the user interface to the SDU MPU.

The RS-232 terminal connection settings for SDU maintenance ports are listed in

Table 4-2.

(2) Using the SDU MPU

This section describes the basic procedures for using and navigating the SDU MPU.

NOTE: There are various levels of access to the MPU. Each level is protected by a different

password. This section describes the MPU functions available using the Level 1

password.

(a) Entering Passwords

You can enter the password any time after the SDU boots.

• To access Level 1 functions, type menu.

NOTE: The password does not appear on the screen when you type it.

(b) Navigating the SDU MPU

• To scroll through the available menus, press CTRL+N.

• To go to the previous menu, press CTRL+O.

• To refresh the menu screen or exit from a Reports Menu, press ESC.

• To enable test or data entry functions, press the letter associated with the menu items.

(d) Selecting Reports

The reports available through the MPU enable users to view information about the

configuration and status of the SDU. This information is used to troubleshoot the

communication system on the aircraft.

To access reports:

Table 4-2 Maintenance Port Connection Settings

Parameter Setting

Character Format ASCII

Baud Rate 19200 bps

No. of bits 8

Parity None

Stop bits 1

Flow Control None

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1 In the MPU, press EQUAL SIGN (=).

A list of reports appears. Active reports show as toggled on. Inactive reports show

as toggled off.

2 To activate a report, type the report number, and then press ENTER.

NOTE: Multiple reports can be activated at the same time; type and enter each

report number separately.

3 To turn off individual, active reports, type the report number you want to toggle off,

and then press ENTER.

4 To turn off all active reports, press EQUAL SIGN (=), and then press X.

(3) Menu Item Descriptions

This section provides a brief description of the Level 1, MPU menu items used for test and

fault isolation procedures.

In active SDUs, menu screens display the firmware version.

NOTE: Depending on the version of software installed and the system configuration, the

menu and reports available to users may differ slightly from the reports described in

this document.

(a) Menu 1

Table 4-3 shows an example Menu 1 screen display.Table 4-3 describes the items

available in Menu 1.

(b) Menu 2

Table 4-4 describes the items available in Menu 2.

Table 4-3 Menu 1 Item Descriptions

Menu Item Description

Y: explain error status Reports error status when failure LED is illuminated. Displays OK if no error

exists.

F: print equipment

stats

Prints a list of the current equipment statistics, including temperature,

number of power-ups, hours of operation, time since power-up, and

processor usage.

Table 4-4 Menu 2 Item Descriptions

Menu Item Description

L: re-enter logon

password

Permits a user to enter a new access level password without having to

reboot the SDU.

Z: reset A781 SDU Enables a complete, soft reset of the SDU; once reset, the menu access

password must be re-entered.

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Table 4-5 describes the items available in Menu 3.

D. Operational and Diagnostic Test Procedures

You can perform all test procedures presented in this section to test the total operational status of

the A781-500 system. You can conduct these operational tests for all equipment returned to service

after repair.

The procedures assume that the technical personnel are familiar with the test equipment used and

can operate the equipment to produce the required inputs and obtain the required results

(indications). Refer to the detailed operating procedures and descriptions of the SDU MPU included

in this section.

V: get firmware versions Displays the kernel and application software versions for the Control

Processor, Data I/O Processor, Channel Cards.

C: query loss of cooling

mode

Indicates if loss of cooling mode is active or inactive.

Table 4-5 Menu 3 Item Descriptions

Menu Item Description

F: list call log Lists Classic call logs for the following events:

• Successful Aero Log-on

• Air-to-ground calls accepted by the SDU

• Ground-to-air calls accepted by the SDU

Lists SBB call logs for the following events:

• Attachment or modification of attachment, including change of beam ID

• Creation or deletion of primary or secondary contexts

O: list DIO ORT Lists of ORT items destined for the Data Processor in human readable

form.

Y: verify CP ORT Verifies if file name of the internal copies of the Secure and User ORT

are valid or corrupted.

G: clear call log Clears the call log after a confirmation.

H: list SCM/CP ORT Lists ORT settings and how they were configured (either by default or

through the maintenance port, or via SCM ORT files). “Set by

maintenance port” indicates that the ORT parameter is set by the

maintenance port.

Table 4-4 Menu 2 Item Descriptions (Continued)

Menu Item Description

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CAUTION: ONLY AUTHORIZED TECHNICAL PERSONNEL WHO ARE TRAINED IN

GENERAL AVIA1.57 TION WORKMANSHIP AND HAVE A BASIC

UNDERSTANDING OF SATCOM SYSTEMS SHOULD PERFORM THE

OPERATIONAL AND DIAGNOSTIC TEST PROCEDURES IN THIS MANUAL.

CAUTION: CHANGES TO DEFAULT VALUES FOR SOME MENU FUNCTIONS MAY

SERIOUSLY DEGRADE SYSTEM OPERATION.

NOTE: This manual describes the basic MPU functions, menus, and reports required for the testing

and fault isolation procedures presented in this section. Consult RC Product Support before

entering any unfamiliar menu selections not described in this manual.

NOTE: Using a terminal emulation program, open a log file and save all test results for future

reference and test records.

Refer to the Outline and Installation diagrams (Figure 3-1 to Figure 3-6) and the Interconnection

and Contact Assignment drawings (Figure 3-7 to Figure 3-9) for additional information.

(1) Test Setup Procedure

The test setup procedure is presented in Table 4-6.

(2) Installation and Operational Verification Tests

To verify that the A781-500 system is ready for operation, use the following procedures:

• Power-On Test

•BITE

(a) Power-On Test

To complete the power-on test, follow the steps in Table 4-7.

Table 4-6 Test Setup Procedure

Step Action

1.0 Make sure that the SDU is powered down and disconnected from the power source.

2.0 Using a 3/32 Allen key, remove the maintenance port cover.

3.0 Connect a maintenance cable to the SDU front-panel maintenance port connector.

4.0 Connect the other end of the cable to the serial port of the computer.

5.0 Open a log file to capture all test data. A log file is a text capture of the ASCII traffic

between the computer attached to the maintenance port and the SDU.

6.0 Follow the procedures in "Installation and Operational Verification Tests" on page 4-6.

Table 4-7 Power-On Test Procedure

Step Action

1.0 Follow the test setup procedure in Table 4-6 on page 6.

2.0 Power-on the SDU.

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(b) BITE

If equipment connected to the A781-500 system provides wrong information or does not

provide a signal to the A781-500 SDU, the SDU cannot function properly.

The SATCOM BITE menu provides information about the results from BITE for various

parts of the A781-500 system.

To check the BITE status, follow the steps in Table 4-.

(3) Post Test

When testing is completed, follow the steps in Table 4-9.

3.0 Check the status of the front panel LEDs. Verify that the green LED flashes for 60

seconds and then turns off. Verify that the red LED is not illuminated. For more

information about the LED signals, refer to "LEDs" on page 1-9.

4.0 Follow the BITE test procedure in "BITE" on page 4-7.

Table 4-8 Power-On Test Procedure

Step Action

1.0 Using the TCP, navigate to the SATCOM BITE page. See "Viewing BITE Information"

on page 2-15.

2.0 Confirm that the following report a status of OK:

•SDU

• Sub System Health

•SCM

• SYS BUS

• Sub System BUS

•RF Path

3.0 If BITE fails the SDU or SCM, remove the component from service and return it to

RC—see "Maintenance and Repair" on page 5-1. Return the UUT along with a

hardcopy printout of the recorded (captured) log file of the test results. Indicate the

date of the test and the serial number of the UUT on the test documentation.

4.0 If BITE fails a component other than the A781-500 SDU or SCM, verify the operation

of that component and test the satellite communication system again. See

"Troubleshooting and Fault Isolation" on page 4-8

5.0 If the Unit Under Test (UUT) PASSED the test, the unit is ready for service.

6.0 Follow the procedures in "Post Test" on page 4-7.

Table 4-7 Power-On Test Procedure (Continued)

Step Action

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2. Troubleshooting and Fault Isolation

This section provides troubleshooting procedures for A781-500 systems.

Troubleshooting procedures require data obtained using the TCP. For specific instructions on how to access

and use the TCP, refer to "Operating the MCDU" on page 2-2.

NOTE: All of the TCP menus discussed in this section are accessed from the SATCOM BITE menu.

A. Subsystem Health

The SATCOM SUBSY HLTH menu provides the BITE status of subsystem components.

To check the subsystem health, on the SATCOM BITE menu, press the button next to SUBSY

HLTH.

Figure 4-2 illustrates the SATCOM SUBSY HLTH menu.

Figure 4-2. SATCOM Subsystem Health Menu

Table 4-10 describes the information available on the SATCOM SUBSY HLTH menu.

Table 4-9 Post Test Procedure

Step Action

1.0 Save the log file of the test results (or data) for future reference.

2.0 Remove power from the SDU that was tested and from all other test equipment.

3.0 Disconnect test equipment from the SDU.

4.0 Replace the maintenance-port connector cover (if it was removed during the test

setup).

1 5 10 15 20 24

1SA TCOM SUBSY HLTH

LNA

1L 3 OK 31R

ANT

2L 5 OK 52R

CONF I G PAR I TY

3L 7 OK 73R

4L 9<RETURN 94R

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B. SATCOM System Bus

The SATCOM SYSTEM BUS menu provides information about the bus status of equipment outside

the A781-500 system. SATCOM services are not available if the equipment does not operate or

communicate properly.

To check the bus status, on the SATCOM BITE menu, press the button next to SYS BUS.

Figure 4-3 illustrates the SATCOM System Bus menu.

Table 4-10 SATCOM Subsystem Health Menu

Label Description Action

LNA Reports the status of the LNA as OK, NO DATA (if

golden label 350 from the antenna is missing or

HGA is disconnected), TEST, or FAULT. The LNA

status matches the HDA status.

If the status is NO DATA, check

the bus connections from the

Antenna and check the speed of

bus.

If the status is FAULT, test or

troubleshoot the LNA equipment.

ANT Reports the status of the HGA as OK, FAULT,

TEST, or NO DATA.

If the status is FAULT, test or

troubleshoot the HGA equipment.

If the status is NO DATA check the

ARINC 429 bus from the Antenna.

FMPA Reports the status of the FMPA as OK, FAULT, NO

DATA, or NONE. If there is no FMPA configured,

the reported status is NONE.

If the status is FAULT, return the

FMPA to RC, the equipment

supplier. If the status is NO DATA

check the cable to the FMPA.

CONFIG

PARITY

Reports the status of the rear connector

configuration parity as OK (parity is odd) or FAULT

(parity is not odd). This status can be different from

the setting of Bit 25 in Label 350 to the CMC, which

is also set if the secure ORT is missing or invalid.

If the status is FAULT, check

strapping—a non-supported

configuration may be strapped.

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Figure 4-3. SATCOM System Bus Menu

Table 4-11 describes the information available on the SATCOM SYS BUS menu.

1 5 10 15 20 24

1 S AT COM SYS BUS 1/2

CFDS INACTIVE

1L 3 TCP#1 OK

31R

TCP# 2 OK

2L 5 TCP#3 OK

52R

IRS- PRI OK

3L 7 IRS-SEC OK 7 3R

4L 9<RETURN 94R

1 5 10 15 20 24

1 S AT COM SYS BUS 2/2

CMU#1 INACTIVE

1L 3 CMU#2 OK

31R

GNSS OK

2L 5 AES ID OK 52R

3L 7 73R

4L 9<RETURN 94R

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C. Thermal Status

As shown in Figure 4-4, the SATCOM OVERTEMP menu reports the thermal status of system

components.

To check the thermal status, on the SATCOM BITE menu, press the button next to OVERTEMP.

Table 4-11 Bus Status Indicators

Bus Status

INACTIVE NO DATA NONE OK

CFDS No labels of correct

speed on bus.

The expected Golden

label (227) is not

present.

The bus is not

installed.

The expected Golden

label is present and the

bus is active at the

correct speed.

CFDS The A781-500 does not support or receive input from the CFDS. Therefore the status will

always be NONE.

TCP No labels of correct

speed on bus.

The expected Golden

label (377) is not

present.

The secure ORT

parameter indicates

the bus is not installed.

The expected Golden

label is present and the

bus is active at the

correct speed.

IRS - PRI No labels of correct

speed on bus.

The expected Golden

label (310) is not

present, i.e. Label 310

or Label 254,

depending on ORT

selection.

N/A

(Primary IRS always

present on this

aircraft.)

The expected Golden

label is present and the

bus is active at the

correct speed.

IRS - SEC No labels of correct

speed on bus.

The expected Golden

label (310) is not

present.

The IRS2Type secure

ORT parameter

specifies whether it is

connected or not

connected.

The expected Golden

label is present and the

bus is active at the

correct speed.

GNSS No labels of correct

speed on bus.

The expected Golden

label (110) is not

present.

The secure ORT

parameter indicates

the bus is not installed.

The expected Golden

label is present and the

bus is active at the

correct speed.

AES ID No labels of correct

speed on bus.

The expected Golden

label (275) is not

present.

The secure ORT

parameter indicates

the bus is not installed.

The expected Golden

label is present and the

bus is active at the

correct speed.

CMU No labels of correct

speed on bus.

The expected Golden

label (270) is not

present.

The secure ORT

parameter indicates

the bus is not installed.

The expected Golden

label is present and the

bus is active at the

correct speed.

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Figure 4-4. SATCOM Overtemp Menu

Table 4-12 describes the information available on the SATCOM OVERTEMP menu.

D. SCM Health

As shown in Figure 4-5, the SATCOM SCM menu reports the status of the communication buses

to the SCM and the status of the secure and user configuration tables.

Table 4-12 SATCOM OVERTEMP Menu

Label Description Action

SDU Reports the SDU thermal status

as OK or FAIL.

If the status is FAIL, check the fan operation and

temperature at the location of the equipment.

HGA Reports the HGA thermal status

as OK, NO DATA, or FAIL.

If the status is FAIL, check the fan operation and

temperature at the location of the equipment.

If the status is NO DATA, check data bus connection.

FMPA Reports the FMPA thermal status

as OK, NO DATA, or FAIL.

If the status is FAIL, check the fan operation and

temperature at the location of the equipment.

1 5 10 15 20 24

1 SATCOM OVERTEM

SDU

1L 3 OK 31R

ANT

2L 5 FAIL 52R

3L 7 73R

4L 9<RE TURN 94R

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Figure 4-5. SATCOM SCM Menu

Table 4-13 describes the information available on the SATCOM SCM menu.

E. Subsystem Bus Status

As shown in Figure 4-6, the SATCOM SUBSY BUS menu reports the status of all subsystem buses

that provide communication between the components of the system.

Table 4-13 SATCOM SCM Menu

Label Description Action

STATUS Reports the SCM status as OK or FAIL. If the status is FAIL, return the SCM to

RC the equipment supplier.

BUS

TO/FROM

Reports the status of the bus to the SCM as

OK or FAIL.

If the status is FAIL, check the

connections to the SCM.

OSS Reports the status of the Secure ORT as

one of the following:

NOT LOADED – No ORT in SCM memory.

OK – Secure ORT is valid.

INVALID – The Secure ORT is corrupted or

otherwise invalid and must be reloaded.

If the status is INVALID or NOT

LOADED, load a SECURE ORT file.

AMI Reports the status of the User ORT as one

of the following:

NOT LOADED – No ORT in SCM memory.

OK – User ORT is valid.

INVALID – The User ORT is corrupted or

otherwise invalid and must be reloaded.

If the status is INVALID or NOT

LOADED, load a USER ORT file.

1 5 10 15 20 24

1 SATCOM SCM

STATUS OSS

1L 3 OK OK 31R

BUS TO/ FROM AM I

2L 5 OK OK 52R

3L 7 73R

4L 9<RE TURN 94R

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Figure 4-6. SATCOM Subsystem Bus Menu

Table 4-14 describes the information available on the SATCOM SUBSY BUS menu. Fields are left

blank if the equipment is not included in the installation.

NOTE: Input and output are with respect to the SDU.

F. RF Path Status

As shown in Figure 4-7, the SATCOM RF PATH menu reports the status of the RF paths.

Table 4-14 SATCOM SUBSY BUS Menu

Label Description Action

ANT Reports the status of the input and

output buses for the antenna as OK,

NO DATA, or FAIL.

If status is NO DATA, label 350 is missing—

check the bus connections.

If status is FAIL, check antenna bus status.

1 5 10 15 20 24

1 S ATCOM SUBSY BUS

1L 3 IN-TOP-OUT 31R

ANT

2L 5 OK / OK 52R

3L 7 7 3R

4L 9<RE TURN 94R

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Figure 4-7. SATCOM RF Path Menu

Table 4-15 describes the information available on the SATCOM RF PATH menu.

G. USIM and Data Bus Status

As shown in Figure 4-8, the SATCOM USIM/DATA menu reports the status of the USIMs and data

buses of the system.

Table 4-15 SATCOM RF PATH Menu

Label Description

RX:DLNA-SDU Reports the status of the RF path from the DLNA to the SDU as OK or FAULT.

If the status is FAULT, check Rx RF cabling between the SDU and the antenna.

TX:SDU-ANT Reports the status of VSWR activity on the SDU-Antenna RF path as OK or

FAULT. If the status is FAULT, check Tx RF cabling between the SDU and the

antenna.

1 5 10 15 20 24

1 SA TCOM RF PATH

PATH VSWR

1L 3 31R

RX : SDU -DLNA

2L 5 OK N / A 52R

TX:SDU- DLNA

3L 7 N/A OK 73R

4L 9<RE TURN 94R

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Figure 4-8. SATCOM USIM/DATA Menu

Table 4-16 describes the information available on the USIM/Data menu.

Table 4-16 SATCOM USIM/DATA Menu

Label Description

USIM#1 Reports the status of USIM#1 bus as OK, WARMING, SBB LOG, FAULT, or N/A

if channel card 1 is not in SBB mode.

If status is FAULT, check that SIM card is not damaged and is properly inserted.

Power cycle after checking.

USIM#2 Reports the status of USIM#2 bus as N/A.

If status is FAULT, check that SIM card is not damaged and is properly inserted.

Power cycle after checking.

USIM#3 Reports the status of USIM#3 bus as N/A.

If status is FAULT, check that SIM card is not damaged and is properly inserted.

Power cycle after checking.

USIM#4 Reports the status of USIM#4 bus as N/A. If status is FAULT, check that SIM card

is not damaged and is properly inserted. Power cycle after checking.

ETH#1 Reports the status of ETH#1 bus as DISABLED, LINK, or NO LINK.

ETH#2 Reports the status of ETH#2 bus as DISABLED, LINK, or NO LINK.

QUAD ETH#3 Reports the status of QUAD ETH#3 bus as DISABLED, LINK, or NO LINK.

QUAD ETH#4 Reports the status of QUAD ETH#4 bus as DISABLED, LINK, or NO LINK.

ETH#5 Reports the status of ETH#5 bus as DISABLED, LINK, or NO LINK.

NOTE: Only Ethernet 3 is fully supported. Ethernet 1, 2, and 5 are not supported and Ethernet 4

is only used for application data loading.

1 5 10 15 20 24

1 SATCOM USIM/DATA

USIM#1 ETH#2

1L 3 OK D I SABLED 31R

US I M# 4

QUA D ETH # 3

2L 5 N/A L INK 52R

ETH# 1 QUAD E TH # 4

3L 7 D I SABLED D I SABLED 73R

ETH#5

4L 9<RETURN DISABLED 94R

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H. ORT

The A781-500 system may not function properly if the ORT parameters do not match the installed

system.

(1) ORT Use and Storage

The ARINC 781 system includes a secure and user ORT. Secure ORT files must be certified

for the aircraft type on which the equipment is installed. Items in user ORT files can be

modified by individual customers and may be customized to an individual aircraft.

You can change secure ORT parameters only by uploading an ORT file. To obtain an ORT

file, contact RC Product Support.

The load procedure loads an ORT file to the SCM using an ARINC 615A data loader. You can

only load ORT data when the aircraft is on the ground and the data load discrete is asserted.

When the SDU boots, it compares the ORT file in its memory to that in the SCM. If the ORT

files do not match, the SDU loads the file from the SCM into its memory.

Some user ORT parameters can be modified in the SDU ORT. You can reset the SDU ORT

to the default values stored in the SCM in the maintenance menus.

(2) Checking the ORT

You can check the content of the ORT file through the maintenance port menus. "SDU

Maintenance Port Utility" on page 4-2 provides information about accessing the maintenance

port menus.

NOTE: The ORT includes many parameters that affect internal operations. These

parameters are not meaningful for technicians troubleshooting the satellite

communication system.

To check the ORT:

(a) In the maintenance port menus, navigate to menu 3.

(b) To list the ORT, press H.

The list of ORT parameters appears. The list is about eight pages long.

Some ORT parameters displayed are system defaults that cannot be modified through

the Secure and User ORT files.

I. Contact Product Support

When the troubleshooting procedures do not find a fault and the A781-500 system does not function

properly, contact RC Product Support.

RC Product Support may ask you to capture and send them system specific logs and reports.

To access logs:

(1) In the maintenance port menus, navigate to Menu 3.

(2) Turn on the text capture feature of the terminal emulator on your computer.

In HyperTerminal, click Transfer, and then click Capture Text.

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(3) To view the call log, in Menu 3, press F.

(4) Turn off the text capture feature of the terminal emulator and send the captured file to RC

Product Support.

To access reports:

(1) Turn on the text capture feature of the terminal emulator on your computer.

In HyperTerminal, click Transfer, and then click Capture Text.

(2) In the maintenance port menus, press EQUAL SIGN (=).

A list of reports appears.

(3) To activate a report, type the number next to the report description, and then press ENTER.

NOTE: RC Product Support will specify the required reports, and may ask you to operate the

A781-500 equipment while the reports gather information.

(4) To stop a report, press EQUAL SIGN (=), then type the number of the report, and then press

ENTER.

NOTE: To stop all reports, press X.

(5) Turn off the text capture feature of the terminal emulator and send the captured file to RC

Product Support.

3. Adjustment/Alignment Procedures

There are no adjustment/alignment procedures required for the A781-500 system.

4. Modification History

The A781-500 system currently has no history of modifications.

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MAINTENANCE AND REPAIR

This section provides maintenance and repair information for the A781-500 system, including the following

sections:

• Maintenance

• Repair

• Instructions for Continued Airworthiness

• Visual Inspection and Check

1. Maintenance

The A781-500 system does not require routine maintenance.

2. Repair

If functional problems occur, the SDU BITE identifies the faulty LRU.

As per continued airworthiness instructions, if an SDU or SCM is inoperative, use the Standard Practices

Chapter of the Aircraft Maintenance Manual to:

• Remove the unit

• Secure cables and wiring

• Collar applicable switches and circuit breakers, and placard them as “inoperative”.

Before flight, revise the equipment list and weight and balance data as applicable, and record the removal

of the unit in the log book. Refer to section 91.213 of the FAR or the aircraft’s minimum equipment list

(MEL).

All repairs must be performed at the RC equipment supplier factory.

3. Instructions for Continued Airworthiness

Periodic inspections of the mechanical and electrical interfaces of the A781-500 system components to

the aircraft should be completed as defined by the governing airworthiness body’s Instructions for

Continued Airworthiness (ICA) for the installation (for example, Transport Canada, the FAA, the EASA).

Installation of the ARINC 781 SATCOM Avionics System on an aircraft by Supplemental Type Certificate

(STC) obligates the aircraft operator to include the maintenance information supplied by this manual in

the operator’s Aircraft Maintenance manual and the operator’s Aircraft Scheduled Maintenance Program.

This section provides the special instructions and maintenance requirements for continued airworthiness

of the A781-500 system.

A. Airworthiness Limitations

When applicable, the Airworthiness Limitations section is FAA-approved, and specifies

maintenance required under Title 14 Code of Federal Regulations (CFR) Part 43.16 and 14 CFR

91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.

This section must be added to the Airplane Maintenance Manuals. The information contained

herein supplements the Airplane Maintenance Manuals only in those areas covered by the

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A781-500 system installation. For limitations and procedures not contained in this supplement,

consult the basic Airplane Maintenance Manuals.

The inspections and airworthiness limitations specified in this section are FAA approved. This

section specifies the inspections and other maintenance required under sections 433.16 and

91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.

B. Electrical and Mechanical Inspection and Check

Periodic inspections of the mechanical and electrical interfaces of the A781 system components to

the aircraft should be completed as defined by the governing airworthiness body (for example,

Transport Canada, the FAA, the EASA).

C. Instructions for Continued Airworthiness

The following paragraphs describe all maintenance requirements and instructions for continued

airworthiness of the A781-500 system:

1. This manual contains maintenance information for the and SCM, including system description,

system operation, installation, test, and fault isolation.

2. Add the following information to the illustrated parts catalog for the aircraft:

• All part numbers referred to in this manual

• All LRUs referred to in this manual.

3. Add all wiring diagram information contained in this manual to the aircraft operator’s

appropriate aircraft Wiring Diagram Manuals.

4. No additional or routine maintenance is required for the on-condition SDU or SCM.

5. If an SDU or SCM is inoperative, follow the instructions listed in "Repair" on page 5-1.

6. Return all units to the RC equipment supplier factory for repair. Refer to "Appendix A: Return

Material Authorization" on page A-1 for detailed removal information and procedures.

7. Install repaired units on the aircraft in accordance with the installation instructions provided in

this manual.

8. Make sure that all repaired units are operating before approving them for return to service,

using the operational verification tests and procedures provided in this manual.

9. Enter the approval for return to service in the logbook, as required by section 43.9 of the FAR.

10. Add the following scheduled maintenance tasks to the aircraft operator’s appropriate aircraft

maintenance program:

(a) Recommended periodic scheduled servicing tasks: None required.

(b) Recommended periodic inspections: as per the aircraft inspection and maintenance

schedule.

system condition and/or latent failures): None required.

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4. Visual Inspection and Check

Perform the following procedures to inspect the SDU and SCM after installation of the units onto the

aircraft.

Follow all approved safety standards and practices during the inspection.

1. Disconnect all circuit breakers to the SDU and SCM and associated systems.

CAUTION: FAILURE TO DISCONNECT CIRCUIT BREAKERS CAN LEAD TO INJURY TO THE

OPERATOR AND DAMAGE TO THE EQUIPMENT.

2. Examine the connection for loose, damaged, or missing hardware.

3. Examine cables and connections. Contact RC Product Support to gauge the severity of the damage

if you find:

•Corrosion

•Chafing

•Wea

• Damage.

4. Tighten any loose connectors to the manufacturer’s recommended value.

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APPENDIX A: RETURN MATERIAL AUTHORIZATION

To return equipment to RC for repair, this RMA procedure must be followed. Failure to comply with this procedure

may result in shipping delays and additional charges.

1. Warranty Returns

Equipment that qualifies for warranty repair can be returned to RC for repair or replacement at their

discretion. The customer shall pay the shipping costs to RC and RC will pay the shipping costs to return

the repaired/replaced unit to the customer.

2. Non-Warranty Returns

Equipment that fails to work properly because of improper or negligent use, abuse, shipping damage, or

any other condition can still be returned to RC for repair or replacement at their discretion. The customer

will be notified of the cost to repair or replace the unit before invoicing for the repair or replacement. The

customer shall pay for the shipping costs to and from RC.

3. Repackaging Requirements

ARINC 781 SDU or SCM components must be returned to RC in approved shipping containers. Failure

to do so may invalidate the warranty.

If SDU or SCM shipping containers are unavailable, they can be ordered from RC when requesting the

RMA number.

4. RMA Procedure

If it is determined that equipment must be returned to RC for repair or overhaul, follow the RMA procedure

below.

1. Have the following information ready before calling RC Product Support:

• Model (e.g., A781-500 SDU)

•Unit part number (e.g., 90402750, 90404775)

• Serial number

• Description of failure

• Aircraft tail number, serial number, and aircraft model number

2. An RC Product Support specialist will attempt to resolve the problem by telephone. If equipment must

be returned to RC, the Product Support Specialist will authorize the R&O Coordinator to issue an RMA

number.

3. Pack the equipment in the original shipping container or a container approved by RC.

4. Write the RMA number on the outside of the shipping container and on all shipping documents, enclose

a copy in the box, and send your prepaid shipment to RC.



[RC to complete]

5. Fax or email the details of the shipment to the R&O Coordinator, including the following information:

Shipment date, carrier name, and the waybill number.

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6. The processing of LRU returns is limited to standard business hours from 8:30 am to 5:00 pm EST.

For general inquires and status requests, contact the R&O department directly:



Phone: [RC to complete]

Email: [RC to complete]

Fax: [RC to complete]

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