Information in this manual is subject to change without notice. ACR Electronics, Inc. makes no warranty, expressed or implied, with regard to this manual, ...
Information in this manual is subject to change without notice. ACR Electronics, Inc. makes no warranty, expressed or implied, with regard to this manual, including but not limited to...
Artex ELT 345 GPS / 406 / 121.5 With Whip Antenna FAA TSO | Aircraft Spruce
ARTEX ELT 345 Emergency Locator Transmitter
Description, Operation, Installation and Maintenance Manual Y1-03-0282 Rev. L
ATA Code #25-62-35
Page 1 of 60
ARTEX PRODUCTS / ACR ELECTRONICS, INC. 5757 Ravenswood Rd, Ft. Lauderdale, FL 33312 www.acrartex.com
ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) This manual includes data for the following equipment:
Component Emergency Locator Transmitter
2-Wire Remote Switch Mounting Tray Installation Kit
Antenna w/Coax (black) Cable, Coaxial, BNC to BNC, 6 ft
ELT 345 Kit Battery Pack, LiMnO2
External Buzzer
Labeled Part No. A3-06-2880 A3-06-2759 A3-06-2882 455-7423 A3-06-2892-1 611-6013-04 8102 A3-06-2883 452-6505
Purchase Part No. 8100 8304 8323
455-7423 8324 in kit 611-6013-04
8102 8322 452-6505
NOTICES
THE INFORMATION CONTAINED HEREIN IS NOT PROPRIETARY.
Information in this manual is subject to change without notice. ACR Electronics, Inc. makes no warranty, expressed or implied, with regard to this manual, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, and non-infringement. In addition, ACR Electronics, Inc. makes no warranty with regard to the documentation or data contained herein. ACR Electronics, Inc. is not liable in the event of incidentals, special, consequential, or any other damages in connection with or arising from furnishing, performance, or use of this manual.
For further information contact Sales, ACR Electronics, Inc., 5757 Ravenswood Rd, Fort Lauderdale, FL 33312-6603. Telephone (954) 981-3333.
AIRWORTHINESS LIMITATIONS
The Airworthiness limitations section is FAA approved and specifies inspections and other maintenance required under 14 CFR§ 43.16 and 91.403, unless an alternative program has been approved.
IMPORTANT NOTICE
ACR Electronics, Inc. will be responsible for full distribution and revisions of ICA's (Instructions for Continued Airworthiness). For inquiries regarding the content and currency of this manual, contact ACR Electronics, Inc., 5757
Ravenswood Rd, Fort Lauderdale, FL 33312-6603. Telephone (954) 981-3333.
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) TABLE OF CONTENTS
TABLE OF CONTENTS ............................................................................................................................... 3
LIST OF ACRONYMS, ABBREVIATIONS AND DEFINITIONS.......................................................................... 6
LIST OF FIGURES ..................................................................................................................................... 8
RECORD OF REVISIONS ........................................................................................................................... 9
SERVICE BULLETIN LIST......................................................................................................................... 10
LIST OF EFFECTIVE PAGES ..................................................................................................................... 11
INTRODUCTION ..................................................................................................................................... 12 1. Manual Usage ............................................................................................................................. 12 A. General............................................................................................................................... 12 B. Application .......................................................................................................................... 12 2. Model Description ........................................................................................................................ 13 A. ELT 345 .............................................................................................................................. 13 3. Approvals.................................................................................................................................... 13 A. ELT..................................................................................................................................... 13 B. Battery ............................................................................................................................... 13 C. RTCA DO-160G Compliance.................................................................................................. 14 4. Frequency Allocation.................................................................................................................... 15 A. Application .......................................................................................................................... 15 B. Discussion........................................................................................................................... 15 5. References .................................................................................................................................. 15 A. Regulatory Documents......................................................................................................... 15 B. Other Documents ................................................................................................................ 16
DESCRIPTION AND OPERATION.............................................................................................................. 17 1. Description.................................................................................................................................. 17 A. Functional Overview ............................................................................................................ 17 B. System Components ............................................................................................................ 18 2. Operation.................................................................................................................................... 20 A. Overview ............................................................................................................................ 20 B. Normal Operation ................................................................................................................ 20 C. Manual Activation ................................................................................................................ 20 D. ELT Reset ........................................................................................................................... 21 E. Functional Check ................................................................................................................. 21 3. Specifications .............................................................................................................................. 21 A. Environmental and Physical .................................................................................................. 21 B. Electrical ............................................................................................................................. 22 C. Antenna .............................................................................................................................. 23
TEST AND FAULT ISOLATION ................................................................................................................. 24 1. Inspection and Test Regulatory Requirements ............................................................................... 24 A. United States ...................................................................................................................... 24 B. Canada ............................................................................................................................... 24
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
C. Other Countries ................................................................................................................... 24
2. Inspection and Test Procedures.................................................................................................... 25 A. Checklist ............................................................................................................................. 25 B. Preparation ......................................................................................................................... 25 C. Coax Cable and Wiring Connections Inspection Item 1........................................................ 25 D. Mounting Tray and Hardware Inspection Item 2 ................................................................. 25 E. Battery Pack Inspection Item 3.......................................................................................... 26 F. G-Switch Functional Check Item 4 ..................................................................................... 26 G. Performance Test Setup....................................................................................................... 27 H. 121.5 MHz Frequency Measurement and Audio Modulation Check Items 5a and 5b ............... 27 I. 121.5 MHz Power Output Measurement Item 5c ................................................................. 28 J. 406 MHz Frequency Measurement Item 5d ........................................................................ 28 K. 406 MHz Power Output Measurement Item 5e.................................................................... 28 L. Current Draw Test Item 5f .................................................................................................... 28 M. Digital Message Verification Item 5g .................................................................................. 29 N. ELT Reset Check Item 5h .................................................................................................. 30 O. Installed Transmitter / Antenna Test Item 6 ....................................................................... 30 P. Antenna Test Item 7 ......................................................................................................... 31 Q. Inspection and Test Documentation Item 8 ........................................................................ 31
3. Fault Isolation ............................................................................................................................. 31 A. Self-Test ............................................................................................................................. 31 B. Troubleshooting .................................................................................................................. 34
REMOVAL .............................................................................................................................................. 35
1. ELT............................................................................................................................................. 35 A. ELT Removal ....................................................................................................................... 35
2. Battery ....................................................................................................................................... 36 A. Battery Removal .................................................................................................................. 36
3. Material or Equipment Return....................................................................................................... 37 A. Shipment Information .......................................................................................................... 37 B. Return Material Authorization ............................................................................................... 37
INSTALLATION....................................................................................................................................... 38
1. Regulatory Requirements and Guidelines ...................................................................................... 38 A. For US Registered aircraft: ................................................................................................... 38 B. TSO C126b, Paragraph D ..................................................................................................... 38 C. FAA .................................................................................................................................... 38 D. Canada ............................................................................................................................... 38 E. Other Countries ................................................................................................................... 38 F. RTCA .................................................................................................................................. 39
2. Mounting Tray............................................................................................................................. 40 A. Location.............................................................................................................................. 40 B. Installation.......................................................................................................................... 42
3. Antenna ...................................................................................................................................... 43 A. General............................................................................................................................... 43 B. Location.............................................................................................................................. 43 C. Installation General Info ...................................................................................................... 43
4. Remote Switch ............................................................................................................................ 44 A. Location.............................................................................................................................. 44 B. Installation.......................................................................................................................... 44
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
5. Buzzer ........................................................................................................................................ 45 A. Location.............................................................................................................................. 45 B. Installation.......................................................................................................................... 45
6. Wiring......................................................................................................................................... 46 A. General Considerations and Recommendations...................................................................... 46 B. Remote Switch Harness Fabrication ...................................................................................... 48 C. ELT D-Sub Plug Installation .................................................................................................. 50 D. Cockpit Remote Switch 9-Pin Plug Installation ....................................................................... 51 E. Antenna Connection ............................................................................................................ 51 F. Airframe Ground Connections ............................................................................................... 51 G. ELT Programming ................................................................................................................ 51 H. RS-232 Acceptable Nav Data ................................................................................................ 52
7. ELT Installation and Test ............................................................................................................. 52 A. Installation.......................................................................................................................... 52 B. Harness ELT D-Sub Plug Sealing........................................................................................... 53 C. Installation Documentation .................................................................................................. 53
8. Battery Pack Installation .............................................................................................................. 53 A. Battery Installation and Reinstallation ................................................................................... 53
ILLUSTRATED PARTS LIST ...................................................................................................................... 55
1. Introduction ................................................................................................................................ 55 A. Purpose .............................................................................................................................. 55 B. IPL Usage Guide .................................................................................................................. 55
2. Manufacturer Name and Address .................................................................................................. 55 A. Ordering Information ........................................................................................................... 55
APPENDIX A ELT REGISTRATION ......................................................................................................... 59
1. Background Information .............................................................................................................. 59 A. Hex ID Code (15-Hex ID)..................................................................................................... 59
2. Registration ................................................................................................................................ 59 A. Responsibility ...................................................................................................................... 59 B. Required Information........................................................................................................... 59 C. Registration Information Resources ...................................................................................... 59 D. Where to Register ............................................................................................................... 59
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) LIST OF ACRONYMS, ABBREVIATIONS AND DEFINITIONS
Term AC AWG BNC CONNECTOR CAR CFR CONTAINER COSPAS-SARSAT
D-SUB RECEPTACLE DER DRIP LOOP ELT EMI EUROCAE FAA FAR FORM 337 FSDO
Definition Advisory Circular Federal Aviation Administration (USA) bulletin with special information. For the purposes of this document, the acronym AC does not refer to electrical alternating current.
American Wire Gauge - An electrical wire diameter standard. Look for this acronym in front of or following a wire size number.
A coax cable connector having 50 impedance and used for RF signal connections.
Canadian Aviation Regulations The rules and regulations governing the manufacture, certification, operation, maintenance and alteration of aircraft in Canada.
Code of Federal Regulations The general and permanent rules published in the Federal Register by the executive departments and agencies of the Federal Government. Title 14, "Aeronautics and Space", contains the FARs.
The term "Container", within the context of this document, refers to a device designed to suppress RF signals, such that the broadcast of an ELT placed in the container cannot reach the SAR satellite system.
The international search and rescue consortium, that governs the international satellitebased search and rescue distress alert detection and information distribution system. For a complete description, go to the official web site for the International COSPASSARSAT Program, http://www.cospas-sarsat.int/en/
D-type (shaped), subminiature connectors connector for low voltage/current signals and electrical currents.
Designated Engineering Representative An individual qualified and designated by the FAA to approve, or recommend approval, of technical data to the FAA.
Extra wire length used to form a U-shaped bend in a wire or cable. Water or other fluids will flow down to the bottom of the loop and drip off. Electrical connections are made at the top of the loop.
Emergency Locator Transmitter ELTs are installed on aircraft and used to send emergency signals to the SAR satellite system. The word "Beacon" is associated with these devices.
Electromagnetic Interference An undesirable disturbance that affects an electrical circuit due to either electromagnetic conduction or electromagnetic radiation emitted from an external source; also called radio frequency interference or RFI.
European Organization for Civil Aviation Equipment EUROCAE documents is widely referenced as a means of compliance to European Technical Standard Orders (ETSOs) and other regulatory documents.
Federal Aviation Administration The United States government agency for aircraft safety and regulation.
Federal Aviation Regulations The rules and regulations governing the manufacture, certification, operation, maintenance, repair and alteration of aircraft in the United States.
FAA Form 337 is required when a major repair and/or major alteration is performed on an aircraft. Refer to FAR, Part 43, Appendix A and the definitions of Major Repair/Alteration contained in FAR, Part 1, for guidance.
Flight Standards District Office FAA district offices responsible for aircraft certification, operation, maintenance and modification issues, approvals and enforcement.
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G-SWITCH LED MIL
P/N PLUG RECEPTACLE RF
RTCA
RTV SAR SCREEN ROOM SERVICE LOOP
TETHER
TSO UTC
VHF VSWR
ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
Velocity switch that detects sudden deceleration and is used to automatically activate an ELT; may also be referred to as a "crash sensor".
Light Emitting Diode Semiconductor device that emits light when current is passed through it. Usually used as a status or warning indicator.
The three-letter acronym that stands for "Military" and precedes military specifications and standards numbers (e.g., MIL-W-2828 would indicate a wire specification and MILSTD-2828 would indicate a standard).
Part Number Refers to an ACR part number, unless otherwise noted.
The term "Plug", within the context of this document, refers to the male half of an electrical connector.
The term "Receptacle", within the context of this document, refers to the female half of an electrical connector.
Radio Frequency The range of electromagnetic radiation that constitutes the radio spectrum and corresponds to the frequency of alternating current electrical signals used to produce and detect radio waves.
Radio Technical Commission for Aeronautics Organization that makes recommendations for airworthiness; refer to http://www.rtca.org/aboutrtca.asp for more information.
A rubbery silicon-based adhesive typically used to prevent vibration problems and water intrusion.
Search and Rescue
Refers to a room designed to block RF signals, such that the broadcast of an ELT placed in the screen room cannot reach the SAR satellite system.
A length of wire or cable at the connection point, of sufficient length to allow a component to be withdrawn from its mounting position and disconnected from its associated wiring.
A cord or similar device that anchors something movable to a stationary point or anchors two items together, such that they cannot become separated beyond the length of the tether.
Technical Standard Order A TSO is a minimum performance standard issued by the FAA for specified materials, parts, and appliances used on civil aircraft.
Coordinated Universal Time A time standard based on International Atomic Time. UTC is the time system used in aviation and is often associated with Greenwich Mean Time (GMT) and/or "Zulu" time.
Very High Frequency The 30 MHz to 300 MHz radio frequency band.
Voltage Standing Wave Ratio The ratio of the amplitude of a partial standing wave at an antinode (maximum) to the amplitude at an adjacent node (minimum), in an electrical transmission line. An ideal transmission line would have a VSWR of 1:1.
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) LIST OF FIGURES
Figure 1 ARTEX ELT 345 Beacon and Mounting Tray.......................................................................... 18 Figure 2 Remote Switch Front View .................................................................................................. 18 Figure 3 Buzzer ............................................................................................................................... 19 Figure 4 Battery Pack Assembly........................................................................................................ 19 Figure 5 Antennas ........................................................................................................................... 19 Figure 6 Performance Test Setup...................................................................................................... 27 Figure 7 Current Draw Test Setup .................................................................................................... 29 Figure 8 Short & Long 406 MHz Message Examples ........................................................................... 30 Figure 9 ELT Removal Sequence....................................................................................................... 35 Figure 10 Battery Pack Removal ....................................................................................................... 36 Figure 11 ARTEX ELT 345 Outline & Dimensions................................................................................ 40 Figure 12 ELT 345 Metal Strap Minimum Clearance Dimensions.......................................................... 41 Figure 13 Typical Mounting Tray Installation ..................................................................................... 42 Figure 14 A3-06-2892-1 Antenna Outlines and Dimensions ................................................................ 44 Figure 15 Remote Switch Outline and Dimensions ............................................................................. 44 Figure 16 Buzzer Outline and Dimensions ......................................................................................... 45 Figure 17 Typical 2-Wire Installation for Unshielded Harness.............................................................. 47 Figure 18 Typical 2-Wire Installation for Shielded Harness ................................................................. 48 Figure 19 Remote Switch Harness Arrangement ................................................................................ 49 Figure 20 Harness Plug Assembly ..................................................................................................... 51 Figure 21 ELT Installation Sequence ................................................................................................. 52 Figure 22 Battery Pack Installation ................................................................................................... 53 Figure 23 ELT 345 Main Assembly and Installation............................................................................. 56 Figure 24 Harness Components ........................................................................................................ 57 Figure 25 Antennas ......................................................................................................................... 58
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) RECORD OF REVISIONS
REVISION A B C D E F G H J K L
CHANGE W/I 05-EN-05
ECO 16144 ECO 16240 ECO 16376 ECO 16385 ECO 16545 ECO 16575 ECO 16714 ECO 17084 ECO 17261 ECO 17300
DATE Aug 06/15 Sept 15/15 Jan 19/16 May 9/16 Jun 15/16 Dec 7/16 Jan 18/17 Jul 20/17 Jan 20/2020 Apr 7/2020 May 28/2020
REVISION
CHANGE
DATE
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) SERVICE BULLETIN LIST
SERVICE BULLETIN NO
ISSUE DATE
SUBJECT
MANUAL REV NO
MANUAL REV DATE
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) LIST OF EFFECTIVE PAGES
SUBJECT
PAGE
Title Page
1
Notices
2
Table of Contents
3
4
5
List of Acronyms, Abbreviations, and Definitions
6
7
List of Figures
8
Record of Revisions
9
Service Bulletin List
10
List of Effective Pages
11
Introduction
12
13
14
15
16
Description and Operation
17
18
19
20
21
22
23
Test and Fault Isolation
24
25
26
27
28
29
30
DATE
5/28/20 5/28/20 5/28/20 5/28/20 5/28/20
5/28/20
5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20
SUBJECT Test and Fault Isolation (cont)
Removal Installation
Illustrated Parts List Appendix A
PAGE
31 32 33 34 35
36
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
DATE
5/28/20 5/28/20 5/28/20 5/28/20 5/28/20
5/28/20
5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20 5/28/20
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) INTRODUCTION
1. Manual Usage
A. General 1) This manual describes the operation, installation and maintenance of the ARTEX ELT 345 emergency locator transmitter (ELT). The information is provided to ensure initial and continued airworthiness. Information presented in this manual is accurate at the time of printing, but is subject to change. Refer to the ARTEX web site at www.acrartex.com for the latest information and any updates to this manual. 2) Information on the COSPAS-SARSAT emergency locator beacon registration requirements and procedures is provided in Appendix A ELT Registration on page 59. 3) ACR Electronics, Inc. reserves the right to add approved components to the ELT system; including but not limited to antennas, remote switches and coaxial cables. These changes are approved as "minor changes" pursuant to FAR 21, Subpart O for TSO holders. 4) Regulatory references contained herein are generally confined to Web links provided in this manual and were accurate at time of printing, but may be subject to change. Consult your national aviation authority for applicable requirements.
B. Application 1) This manual constitutes supporting data/documentation for the ARTEX ELT 345, including: a) Description and Operation b) Test and Fault Isolation (includes inspection criteria) c) Removal d) Installation e) Registration f) Illustrated Parts List 2) In the United States, the ARTEX ELT 345 must be installed and maintained in accordance with the requirements herein, 14 CFR, FAR Parts 43, -91 and other airworthiness requirements, as applicable. 3) In Canada, the ARTEX ELT 345 must be installed and maintained in accordance with the requirements herein as well as Canadian Aviation Regulations (CAR); Part V, Paragraph 551.104 as well as other CAR airworthiness requirements, as applicable. 4) ARTEX ELT 345 installation and maintenance in all other countries must comply with the requirements herein as well as applicable national airworthiness requirements. In the absence of any inspection requirements from national regulatory authorities, operators should follow the annual inspection procedures outlined in Inspection and Test Regulatory Requirements, subsection United States on page 24 of this manual. 5) The accessories (i.e. remote switch and antennas) referenced in this manual are those most commonly associated with the ARTEX ELT 345. Other options, such as an alternative remote switch configuration or a navigation interface, should be installed and maintained in accordance with instructions specific to the accessory.
NOTE: Contact ACR Electronics, Inc. for optional accessories approved for use with the ARTEX ELT 345.
6) To ensure proper operation, only parts listed in the Illustrated Parts List of this manual or those recommended by ACR Electronics, Inc. may be used as replacement parts for the ARTEX ELT 345.
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
2. Model Description
A. ELT 345 1) The ARTEX ELT 345 is a type AF (Automatic Fixed) beacon, which transmits on 121.5 and 406 MHz. 2) The housing is made of impact-resistant polycarbonate-polyester plastic. 3) The mounting tray is made of aluminum with a stainless steel strap. 4) An installation kit, cockpit remote switch, coax cable, audible buzzer and fixed antennas are included in the kit.
3. Approvals
A. ELT
1) FAA TSO C126b, type AF
a) This article meets the minimum performance and quality control standards required by a technical standard order (TSO). Installation of this article requires separate approval.
2) COSPAS-SARSAT
3) For all other type approval information, please refer to the ARTEX web site at www.acrartex.com.
B. Battery
CAUTION:
LITHIUM BATTERY SAFETY CONCERNS INCLUDE THE POSSIBILITY OF FIRE, VENTING VIOLENTLY, AND VENTING OF TOXIC GASES.
1) The lithium battery packs used on the ARTEX ELT 345 are certified under TSO C142a.
NOTE:
The conditions and tests for TSO approval of this article are minimum performance standards. Those installing this article, on or in a specific type or class of aircraft, must determine that the aircraft installation conditions are within the TSO standards. TSO articles must have separate approval for installation in an aircraft. The article may be installed only according to 14 CFR part 43 or the applicable airworthiness requirements. Lithium cell and battery safety concerns include the possibility of fire and venting of toxic gases.
2) If the battery is installed by a third party, it must be ascertained whether it is an ARTEX Authorized Service center. To find an authorized service center, go to http://www.acrartex.com/where-to-buy/find-a-batteryservice-provider/
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
C. RTCA DO-160G Compliance
1) DO-160G Environmental Categories: [C1X]BC[DO-204a][S(C)]XR28XSZZAZ[ZCX][DO204a]M[282828][2828]28X
2) The DO-160G environmental categories breakdown is detailed in Table 1.
CAT
SECTION
DESCRIPTION
COMMENTS
C1
4.0
Temperature/Altitude
X
4.5.5 In-Flight Loss of Cooling
B
5.0
Temperature Variation
Not Applicable B = 5°C/min
C
6.0
Humidity
10 Day Test
DO-204A [S(C)]
7.0
Operational Shocks and
Crash Safety
8.0
Vibration
Tested to RTCA DO-204A Requirements
X
9.0
Explosion Atmosphere
Test
R
10.0
Waterproofness
Not Applicable Continuous Stream
X
11.0
Fluid Susceptibility
Not Applicable
X
12.0
Sand and Dust
Not Applicable
X
13.0
Fungus Resistance Test
Not Applicable
S
14.0
Salt Fog
Z
15.0
Magnetic Effect Test
Z
16.0
Power Input Test
A
17.0
Voltage Spikes
Z
18.0
AF Susceptibility
ZCX
19.0
DO-204A
20.0
Induced Signal Susceptibility RF Susceptibility
Tested to RTCA DO-204A Requirements
M
21.0
RF Emissions
[282828] [2828]
22.0
Lightning Induced
Transient Susceptibility
23.0
Lightning Direct Effects
Not Applicable Not Applicable
X
24.0
Icing Test
Not Applicable
X
25.0
Electrostatic Discharge
Test
X
26.0
Fire, Flammability Test
Fire Resistance ED-62A Optional for ELT(AF)
Table 1 Environmental Categories
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4. Frequency Allocation
A. Application 1) This section addresses the 406.0 - 406.1 MHz transmitter frequencies which are assigned to the distress frequency band.
B. Discussion 1) The product identification label on each ELT specifies the transmission frequencies of the individual ELT. The ARTEX ELT 345 transmits a frequency of 406.040 MHz. Allocation of frequencies, based on beacon population per specified frequency band, is controlled by COSPAS-SARSAT. 2) The frequency references throughout this manual for the 406 MHz component should be considered the baseline and the specific frequency indicated on the ELT product label should be substituted.
5. References
A. Regulatory Documents 1) The following regulatory documents are referred to herein. When referring to such documents, it is the manual user's responsibility to ensure they are using the latest revision or release of such documents. To that end, the revision designator of specific document numbers has not been included, with the exception of the RTCA document listing, which reflects the revision level of the documents at the time of TSO testing and certification. 2) Except in the case of a printed manual, reference documents available on-line or source locations are linked to applicable web sites. 3) United States a) AC 43-9, "Maintenance Records" b) AC 43-210, "Standardized Procedures for Requesting Field Approval of Data, Major Alterations, and Repairs" c) AC 43.9-1, "Instructions for Completion of FAA Form 337" d) AC 43.13-1, "Acceptable Methods, Techniques, and Practices Aircraft Inspection and Repair" e) AC 43.13-2, "Acceptable Methods, Techniques, and Practices - Aircraft Alterations" f) CFR Title 47, Part 87, "Aviation Services" g) FAR, Part 43, "Maintenance, Preventive Maintenance, Rebuilding, and Alteration" h) FAR, Part 91, "General Operating and Flight Rules" i) TSO-C126b, "406 MHz Emergency Locator Transmitter (ELT)" j) TSO-C142a, "Non-Rechargeable Lithium Cells and Batteries" 4) Canada a) CAR, Part V, "Airworthiness" b) CAR, Part VI, "General Operating and Flight Rules" 5) COSPAS-SARSAT a) C/S G.005, "Cospas-Sarsat Guidelines on 406 MHz Beacon Coding, Registration and Type Approval" b) C/S S.007, "Handbook of Beacon Regulations" 6) RTCA The following documents are available for purchase at RTCA's Web Site, www.rtca.org, or by mail: a) DO-160G, "Environmental Conditions and Test Procedures for Airborne Equipment" b) DO-178B, "Software Considerations in Airborne Systems and Equipment Certification" c) DO-182, "Emergency Locator Transmitter (ELT) Equipment Installation and Performance" d) DO-204A, "Minimal Operational Performance Standards for 406 MHz Emergency Locator Transmitters (ELT)"
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
B. Other Documents 1) The ARTEX model beacon programmer or beacon test set operating manuals are available from ACR Electronics, Inc. upon request: a) Document number 570-1000, "453-1000 ELT Test Set Operation" b) Document number 570-2000, "453-2000 Handheld Programmer Operations Manual" c) Document number Y1-03-0272, "A3-06-2824 Handheld Programmer Operations Manual" d) Document number Y1-03-0273, "A3-06-2825 ELT Test Set Operation"
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) DESCRIPTION AND OPERATION
1. Description
A. Functional Overview 1) The ELT automatically activates during a crash and transmits a continuous standard sweep tone on the 121.5 MHz frequency. The first digitally encoded 406 MHz burst will start transmitting. Approximately every 50 seconds thereafter, the 406 MHz transmitter turns on and transmits an encoded signal of either 440ms or 520 ms, depending on the beacon programming protocol. This message is received by the Cospas-Sarsat Search and Rescue (SAR) satellite system.
2) The information contained in the message includes: a) Beacon serial number, or
b) Aircraft identification or registration number c) Country of registration and country code
d) Position coordinates, if beacon is programmed to receive position data from the aircraft navigation system
3) When the 406 MHz signal is detected by the CospasSarsat satellite system, a position is calculated and the 121.5 MHz signal is used to home in on the crash site.
4) The 406 MHz transmitter will operate in this mode for 24 hours and then shut down automatically. The 121.5 MHz transmitter (homer transmitter) will continue to operate until the batteries are exhausted, which is at least 50 hours.
5) The location accuracy of the 406 MHz transmitter is typically 3 km. If position information is extracted from the aircraft navigation system, the accuracy improves to approximately 100 meters (standard or national location protocol).
6) The 406 MHz digital message provides search and rescue authorities the information to contact the owner/operator of the aircraft through information contained in a database. The database may include: a) Type of aircraft and aircraft registration number
b) Owner address and telephone number c) Alternate emergency contact 7) Previous to February 9, 2009, the COSPAS-SARSAT system used the 121.5 MHz signal as an aid to determine beacon location. As of this date, the use of this signal for satellite location has been terminated, as the accuracy proved too poor. 406 MHz capable ELTs replace the older Class B beacons. 8) Aircraft communications transceivers are not capable of receiving 406 MHz transmissions; therefore, the only methods of monitoring the ELT are:
a) The blinking cockpit remote switch LED b) The buzzer
c) 121.5 MHz transmissions, which can be monitored using the aircraft communications transceiver or an AM radio tuned to the frequency 121.5 MHz.
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
B. System Components
1) The ARTEX ELT 345 housing assembly is made of high impact, fire resistant, polycarbonate-polyester plastic. The tray is fabricated from aluminum, with a stainless steel holding strap. (see Figure 1).
Figure 1 ARTEX ELT 345 Beacon and Mounting Tray
2) The cockpit-mounted remote switch assembly includes a status LED and control switch. The switch allows the operator to manually activate and reset the ELT for testing (see Figure 2).
Figure 2 Remote Switch Front View 3) The buzzer provides an audible alert when the ELT is active (see Figure 3).
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Figure 3 Buzzer 4) The battery pack for the ARTEX ELT 345 consists of two "D" size Lithium Manganese Dioxide cells (see
Figure 4).
Figure 4 Battery Pack Assembly 5) There is only one type of antenna that is approved for use with the ARTEX ELT 345 (see Figure 5). This
antenna is ARTEX part # A3-06-2892-1
Figure 5 Antennas
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
2. Operation
A. Overview
1) A primary feature of the ARTEX ELT 345 is its simplicity of operation.
2) A connection jumper ("G-switch loop") between pins 5 and 12 on the D-sub receptacle enables the Gswitch circuitry, allowing activation when the acceleration threshold is exceeded. The jumper is located in the mating D-sub receptacle of the cockpit remote switch wire harness. When this D-sub receptacle is removed, the ELT can be manipulated without the possibility of activation.
3) With the G-switch loop in place, neither the cockpit remote switch nor the ELT control switch can be positioned to prevent automatic activation. With the G-switch loop open (removed), the ELT cannot be activated by dropping, rough handling or during shipping.
NOTE:
The toggle switch can still activate the ELT regardless of G-switch loop status.
4) Activation is indicated by the presence of the swept audio tone transmitted on the 121.5 MHz signal, the buzzer sounding and the flashing cockpit remote switch and/or ELT status LED. All these indicators immediately begin upon ELT activation.
5) To reset the beacon, the position of either the local ELT switch or the cockpit remote switch must be changed from "ON" to "ARMED". If activation is from the G-switch, the switch position must first be set to "ON" then changed to "ARMED".
NOTE:
The ELT g-switch CANNOT be disarmed or disabled from the cockpit. Cockpit operation is limited to activating and resetting the ELT.
6) A warning buzzer is required by TSO C126b to indicate ELT activation when the aircraft is not operating. The buzzer is powered by the ELT and is not dependent upon the aircraft power for operation. The indicator "beeps" periodically, with the periods between pulses increasing with activation time.
B. Normal Operation
NOTE:
The beacon will immediately begin transmitting at 121.5 MHz and will continue to do so until the ELT is deactivated or 24 hours have expired.
NOTE:
The beacon will begin transmitting at 406 MHZ approximately 50 seconds after activation and will continue to do so at approximately 50 second intervals until the ELT is deactivated or 24 hours have expired.
1) In normal operation, the ELT is "ready to activate". The cockpit remote switch and the control switch on the ELT are both in the "ARM" position. The G-switch loop (connection jumper between pins 5 and 12 of the D-sub receptacle) is in place to enable the ELT. In this condition, if the ELT movement causes the Gswitch threshold to be exceeded, the beacon will activate.
C. Manual Activation
1) The ELT may be manually activated by placing either the remote switch or the ELT control switch in the "ON" position. This forces the ELT to activate, regardless of whether or not the G-switch loop is in place.
NOTE:
The ELT cannot be reset if either the cockpit remote switch or the ELT control switch is in the "ON" position.
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D. ELT Reset 1) If the ELT is inadvertently activated (for indications, see 4) above), reset it by moving either the cockpit remote switch or the local ELT switch to the "ON" position, and then move it back to the "ARM" position. If the switch is already in the "ON" position, move it to the "ARM" position.
E. Functional Check 1) A monthly functional check is recommended to verify operational status of the ELT. Perform in accordance with ELT Reset Check Item 5h.
3. Specifications
A. Environmental and Physical 1) Table 2 lists the environmental and physical specifications of the ELT 345.
CRITERIA
PARAMETER
CHARACTERISTIC
Temperature
Storage Operating Vibration
Shock Crashworthiness
-55°C to +85°C -20°C to +55°C 10 g, 5 Hz to 2,000 Hz 500 g for 4 ms 100 g for 23 ms
Mechanical
Humidity Penetration
Crush
95% for 50 hours 55 lbs from 6 in (25 kg from 15
cm)
1,000 lbs (454 kg)
Altitude
+55,000 ft (16,764 m)
Automatic Activation
Primary G-switch
4.5 ± 0.5 ft/sec (2.3 G)
Manual Activation Weight
Dimension (L x W x H) Software/Firmware
Unit or remote switch
ELT complete w/Battery Pack, and Mounting Tray
ELT Complete w/Battery Pack, and Mounting Tray
2.00 lbs (0.9 kg)
6.40" x 3.78" x 2.96" (163 x 96 x 75 mm)
In accordance with RTCA/DO-178B, Level D
Table 2 Environmental Specifications
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B. Electrical
1) Table 3 lists the electrical specifications of the ELT 345.
CRITERIA
PARAMETER
CHARACTERISTIC
Operating Frequencies
406.040 MHz 121.5 MHz
± 1 kHz ± 6.075 kHz
Emission Designators
406.040 MHz 121.5 MHz
16K0G1D 3K20A3X
Modulation Transmitter Duty Cycle Peak Effective Radiated Power (EIRP)
Occupied Bandwidth
406 MHz 121.5 MHz
406 MHz
121.5 MHz 406 MHz 121.5 MHz 406 MHz 121.5 MHz
Bi-Phase L (G1D)
Amplitude Modulation (A3X) 440 or 520 ms (± 1%), approximately every 50 seconds (± 5%) Continuous EIRP 5 W (37dBm) for 24 hrs @ -20°C to +55°C
EIRP 50 mW (17 dBm) for 50 hrs @ -20°C to +55°C
20 KHz max
25 KHz max
Spurious Emissions
406 MHz 121.5 MHz
Per RTCA/DO-204A Per CFR Title 47 (FCC), Part 87
Type of Cell
Lithium Manganese Dioxide
Battery
Voltage
5.9 (typical)
Amp-Hour Rating
11.1
Table 3 Electrical Specifications
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C. Antenna
1) Table 4 lists the antenna specifications of the ELT 345.
PARAMETERS
CHARACTERISTICS A3-06-2892-1
Frequencies Impedance (ohms)
VSWR
Polarization Radiation Pattern RF Power Handling
Weight Coax Cable Connector Dimensions (Base to Tip)
121.5, 406 MHz 50 Nominal
121.5 MHz2.0:1 Max. 406 MHz 1.5:1 Max
Vertical Monopole Omnidirectional
10 Watts CW 0.19 lbs (0.09 kg)
RG-142 (>0.5dB <1 dB Insertion Loss)* BNC Female
23.4 in (594 mm)
Table 4 Antenna Specifications
NOTE:
The ARTEX recommended coaxial cable Part No. 611-6013-04 (6 ft) complies with the minimum and maximum cable insertion losses quoted above. If the installer has a need for a longer cable run, the use of a low-loss cable that meets the equivalent cable loss in dB must be utilized.
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) TEST AND FAULT ISOLATION
1. Inspection and Test Regulatory Requirements
A. United States 1) In accordance with FAR Part 91, Subpart C, § 91.207 (d), the ELT must be inspected within 12 calendar months after the last inspection for: a) Proper installation b) Battery corrosion c) Operation of controls and crash sensor; and d) The presence of a sufficient signal radiated from its antenna. 2) All maintenance shall be performed in accordance with FAR Part 43, Appendix D, which requires the following inspections at each annual or 100-hour inspection: a) ELT and mount for improper installation b) Wiring and conduits for improper routing, insecure mounting, and obvious defects c) Bonding and shielding for improper installation and poor condition d) Antenna, including trailing antenna, for poor condition, insecure mounting, and improper operation
NOTE:
ARTEX recommends using www.406Test.com to ensure the ELT 345 is testing through-thesatellite during annual inspections and initial installations.
B. Canada
1) CAR Part VI, Standard 625, Appendix C, requires the ELT to be inspected at intervals not exceeding 12 months.
2) All maintenance and testing shall be performed in accordance with the requirements of CAR Part V, Standard 571, Appendix G, which requires:
a) Corrosion inspection
b) Operational testing
c) Performance testing (not to be satellite receivable, i.e. in a Faraday cage), including:
1. Measured peak power after 3 minutes of operation
2. Measured frequency after 3 minutes of operation
3. Audio modulation, which shall be recognizable as a typical ELT signal
4. Measured current draw in the "ARM" (OFF) and in the "ON" position, as specified by the manufacturer
5. The automatic activation system
C. Other Countries
1) For all other countries, maintenance and testing shall be conducted in accordance with the requirements of applicable national regulatory authorities and the requirements herein, as applicable. Local regulations and requirements shall take precedence.
2) In the absence of any inspection requirements from national regulatory authorities, operators should follow the annual inspection procedures outlined in Inspection and Test Regulatory Requirements, subsection United States above.
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2. Inspection and Test Procedures
A. Checklist
1) Table 5 provides a list of the ELT inspection and testing requirements, a copy of which may be used as a checklist to verify inspection and test completion. The item numbers in the table correspond to the item identifiers for each task.
NOTE:
ITEM NO. 1 2 3 4 5a 5b 5c 5d 5e 5f 5g 5h 6 7 8
Items 5a through 5h are mandatory requirements only in Canada, in addition to meeting the other inspection and test requirements listed in Table 5.
DESCRIPTION
BY
Coax Cable and Wiring Connections Inspection
ELT Mounting Tray and Hardware Inspection
ELT Battery Pack Inspection
G-Switch Functional Check
121.5 MHz Frequency Measurement
Audio Modulation Check
121.5 MHz Power Output Measurement
406 MHz Frequency Measurement
406 MHz Power Output Measurement
Current Draw Test
Digital Message Verification
ELT Reset Check
Installed Transmitter Test
Antenna Test
Inspection and Test Documentation
Table 5 ELT Inspection & Checklist
B. Preparation 1) Remove the ELT. See Figure 9 on page 35 for instructions. 2) Remove the battery pack. See Figure 10 on page 36 for instructions.
C. Coax Cable and Wiring Connections Inspection Item 1 1) Check remote switch harness D-sub receptacle for corrosion, bent or broken pins and other damage. 2) Check antenna coax cable connectors for corrosion, bent or broken center conductor, and other damage.
NOTE:
Pay special attention to the center conductor, which is prone to retracting into the connector housing.
D. Mounting Tray and Hardware Inspection Item 2 1) Inspect mounting tray for cleanliness, cracks, and other damage. 2) Check mounting tray hardware for corrosion and security.
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E. Battery Pack Inspection Item 3
CAUTION: CAUTION:
THE BATTERY PACK CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE (ESD) COMPONENTS AND, AS SUCH, IT MUST BE HANDLED WITH CARE. IF POSSIBLE, WEAR A GROUNDED WRIST STRAP WHEN HANDLING THE BATTERY PACK DURING INSPECTION AND MAINTENANCE ACTIVITIES. TAKE PARTICULAR CARE TO AVOID TOUCHING THE EXPOSED CIRCUIT BOARD AND CONNECTOR PINS ON THE BOARD.
DO NOT USE ANY FOREIGN CLEANER ON ELT COMPONENTS. SUCH CHEMICAL AGENTS CAN BE HIGHLY DESTRUCTIVE TO THE MOUNTING HARDWARE AND ELT HOUSING, CAUSING CRACKING, FRACTURING AND OTHER DAMAGE.
1) Check battery cells, components, and connectors for corrosion and other damage. There should be no corrosion of the battery cells. The presence of any corrosion is cause to reject the battery pack.
2) Check wiring for breaks, damaged insulation, and improper or damaged connections. 3) Check housing for cracks and other visual damage. 4) Check the battery pack expiration date. 5) Replace the battery pack if any of the following conditions are true:
a) After use in an emergency b) After an inadvertent activation of unknown duration c) When the total of all known transmissions exceeds one hour d) On or before battery replacement (expiration) date
NOTE:
The new expiration date for replacing the battery must be legibly marked on the outside of the transmitter and entered in the aircraft maintenance record.
F. G-Switch Functional Check Item 4 1) Reinstall the battery in accordance with Battery Pack Installation on page 53. 2) Perform this functional check within the first 5 minutes after the hour (UTC), as required by AC 43.13-1, Chapter 12, § 12-22, Note 3. 3) Notify any nearby control tower of your intentions. 4) Install the 500-0079 G-switch Loop Test Connector Fixture on the ELT receptacle or jumper ELT receptacle pins 5 and 12. 5) Verify the ELT switch is in the "ARM" position. 6) Monitor 121.5 MHz on an AM receiver. 7) Activate the ELT by using a rapid forward (i.e., throwing) motion in the direction of the arrow on the ELT label, followed by a rapid reversing action. 8) Verify presence by listening for the aural sweep tone on the receiver. The LED on the ELT housing will also begin to flash, indicating activation. For proof, the AM radio will verify that the RF output is operational. 9) Reset the ELT by toggling the control switch to the "ON" position and then back to the "ARM" position.
NOTE:
After removing the G-Switch loop plug, wait at least 60+ seconds before a Self-Test is done in order to get the 6 flash error, indicating the loop has been removed.
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CAUTION: IF ACTIVATED, THE ELT WILL SEND A LIVE BURST SIGNAL TO SEARCH AND RESCUE SATELLITES IF LEFT ACTIVE FOR APPROXIMATELY 50 SECONDS OR MORE. BE SURE TO SWITCH ELT BACK TO THE "ARM" POSITION AS SOON AS THE SWEEP TONE IS VERIFIED.
G. Performance Test Setup
1) Maximum Battery Test Time
a) The ELT 345 firmware continually keeps track of the beacon run time. The beacon controller microprocessor writes the operating time information to a memory IC in the battery pack, keeping the information up to date. Per FAA regulations, an ELT battery must be replaced if the operation time is greater than one hour.
b) If the operation time exceeds one hour, an error indicator will be displayed when a self-test is performed (see Fault Isolation and Self-Test on page 30). This does not affect the normal operation of the ELT 345, but provides an indication to the user that the battery must be replaced, in order to comply with the FAA requirements. To minimize battery run time, carefully plan all testing and operation verifications, in order to avoid unnecessary operation of the ELT.
2) Place the ELT in an RF enclosure or screen room to prevent RF emissions.
3) For final airworthiness verification, use the ELT's own battery pack as the power source for these measurements. An alternate power source can be used where lengthy servicing, other than the performance tests, is anticipated. Expired battery packs can be used if the airworthiness performance of the battery pack in the system is not required. The battery packs are capable of at least fifty (50) hours of operation at the end of six years of useful life.
4) To prevent damage to the measurement equipment from the 5W, 406 MHz burst, install an RF attenuator (rated 50 ohm) between the ELT antenna output and the measurement equipment. Typical attenuation is 30 dB, 50 ohm, and rated at 5 watts for ½-second duration (see Figure 6 Performance Test Setup).
Figure 6 Performance Test Setup
H. 121.5 MHz Frequency Measurement and Audio Modulation Check Items 5a and 5b 1) Connect the measuring device as specified in Figure 6 Performance Test Setup. 2) Activate the ELT by placing the control switch in the "ON" position. 3) Wait three minutes. 4) Perform an Audio Modulation Check (Item 5b) during the three-minute waiting period as follows: a) Monitor 121.5 MHz on an AM receiver. b) Listen for the downward swept tone on the receiver. 5) Measure the frequency. The frequency must be within the tolerance specified in Table 3 on page 22.
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I. 121.5 MHz Power Output Measurement Item 5c
1) Connect the measuring device as specified in Figure 6 Performance Test Setup on page 27.
2) Activate the ELT, if necessary, by placing the control switch in the "ON" position.
3) Wait three minutes.
4) Read the displayed amplitude for 121.5 MHz. The amplitude must be within the minimum specified for 121.5 MHz in Table 3 on page 22 at the terminal output.
J. 406 MHz Frequency Measurement Item 5d
CAUTION:
POWER OUTPUT IS APPROXIMATELY 5 WATTS. ENSURE THAT ADEQUATE ATTENUATION IS INSERTED BETWEEN THE ELT AND THE MEASURING INSTRUMENT.
1) Connect the measuring device as specified in Figure 6 Performance Test Setup on page 27. 2) Activate the ELT using the local ELT switch. 3) Wait three minutes. 4) Measure the frequency after the stabilization period. The frequency must be within the tolerance specified
in Table 3 on page 22.
NOTE:
The exact 406 MHz frequency is printed on the ELT product label.
K. 406 MHz Power Output Measurement Item 5e
CAUTION:
POWER OUTPUT IS APPROXIMATELY 5 WATTS. BE SURE ADEQUATE ATTENUATION IS INSERTED BETWEEN THE ELT AND THE MEASURING INSTRUMENT.
1) Connect the measuring device as specified in Figure 6 Performance Test Setup on page 27.
2) Activate the ELT, if necessary, by placing the control switch in the "ON" position.
3) Wait three minutes.
4) Read the displayed amplitude of the 406 MHz burst that follows the three-minute wait period. The amplitude must be within the minimum specified for 406 MHz in Table 3 on page 22, at the output terminal.
5) Deactivate the ELT by placing the control switch in the "ARM" position.
L. Current Draw Test Item 5f
CAUTION:
EXERCISE EXTREME CAUTION TO AVOID A SHORT CIRCUIT CONDITION OF THE BATTERY PACK CONNECTIONS. THIS WILL BLOW A FUSE IN THE BATTERY PACK, FORCING REPLACEMENT.
CAUTION:
ALL ON STATE CURRENT MEASUREMENTS MUST BE MADE WITH THE ANTENNA OUTPUT TERMINATED IN 50 OHMS.
CAUTION:
THE 406 MHZ SIGNAL PULSES EVERY 50 SECONDS (APPROXIMATE) AND MAY DRAW UP TO 4 AMPERES FOR ½ SECOND. MANY METERS WILL NOT RESPOND THIS FAST OR READ THIS TYPE OF WAVEFORM ACCURATELY. BECAUSE OF THIS, ACR ELECTRONICS, INC. DOES NOT RECOMMEND MEASURING THE 406 MHZ BURST CURRENT.
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1) Verify the ELT control switch is in the "ARM" position.
2) Disconnect the battery pack from the ELT.
3) Install test fixture 8104 in the power circuit in series between the battery pack connector and the ELT connector (see Figure 7 Current Draw Test Setup).
Figure 7 Current Draw Test Setup
4) Terminate the ELT RF output with a 50 load. 5) Set the ammeter for the lowest possible scale and connect the leads to A and B. 6) Measured current must be < 5 µA (micro-amps).
CAUTION:
THE NEXT MEASUREMENT COULD CAUSE THE INTERNAL PROTECTION FUSE OF THE AMMETER TO BLOW, IF PRECAUTIONS ARE NOT OBSERVED.
7) Set the ammeter current range to accommodate 4A (amp). 8) Activate the ELT. 9) Allow ELT to transmit a 406 MHz burst. This will occur approximately 50 seconds after activation. 10) Set the ammeter to read approximately 60 mA of current. 11) Observe reading. Current shall be 55 mA. 12) Deactivate the ELT. 13) Remove the test fixture and reinstall the battery pack in accordance with Battery Pack Installation on page
53.
Hints:
a) Short the meter leads (at the meter) with a banana plug-type jumper lead to protect the fuses in the meter.
b) Using a spectrum analyzer as a load device, detect when the 406 MHz burst has occurred. M. Digital Message Verification Item 5g
1) Use a beacon reader, such as ARTEX P/N 453-1000, 453-2000, 8700, or 8701 to test the transmitted digital message.
2) Connect the beacon tester to the ELT, per the instructions of the reader. 3) Perform a self-test by placing the control switch in the SELF-TEST position. Once the LED blinks once,
release the switch. Do not hold the switch in SELF-TEST position for longer than 1 second. Example results are shown in Figure 8 Short & Long 406 MHz Message Examples. Actual messages will vary depending on the protocol and information programmed into the ELT.
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a) If the ELT is programmed with a location (long message) protocol and disconnected from the aircraft navigation system or interface device, the message will indicate "Position Invalid" in lieu of position data, as shown in the right hand example.
Figure 8 Short & Long 406 MHz Message Examples
N. ELT Reset Check Item 5h 1) Place the ELT control switch in the "ON" position. 2) Return the switch to the "ARM" position. 3) If the ELT is working properly, the LED will turn off.
O. Installed Transmitter / Antenna Test Item 6 1) Re-install the ELT in Aircraft. 2) Perform the following functional check within the first 5 minutes after the hour (UTC), as required by AC 43.13-1, Chapter 12, § 12-22, Note 3. 3) Notify any nearby control tower of your intentions. 4) Tune an AM receiver to 121.5 MHz.
NOTE:
A low-cost AM radio is suggested for this test, as the aircraft Communications Transceiver is very sensitive and may pick up a weak signal, even if the antenna is disconnected from the ELT. There is no need to activate the beacon to verify 121.5 MHz presence.
5) Locate the radio approximately 20' to 30' from the antenna. 6) Perform a self-test by moving the switch to "TEST", then release. (Cockpit remote switch to the "TEST"
position.) 7) Listen for 2 audible sweeps on the receiver, which takes about 1 second. 8) Verify the buzzer sounds upon activation. 9) Note the LED activity on the cockpit remote switch. If the ELT is working properly, the LED will stay on for
approximately 1 second and then turn OFF.
NOTE:
This test also completes the requirement to check ELT controls by verifying operation of the remote switch.
10) Refer to Table 6 if the LED displays error code flashes.
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P. Antenna Test Item 7
1) Tune a low quality AM receiver (i.e., radio) to 121.5 MHz.
NOTE:
The aircraft transceiver is not recommended for this test, because it is too sensitive to verify the integrity of the antenna system and it may pick up a weak signal even if the antenna is disconnected from the ELT. An AM radio provides a better level of confidence for this test.
2) Place the radio approximately six inches from the antenna.
3) Perform self-test by moving the switch to "TEST", then release. (Cockpit remote switch to the "TEST" position.)
NOTE:
Perform this test within the first five minutes after the hour UTC.
4) Listen for 2 audible sweeps on the radio, which takes about 1 second. An audible signal verifies energy is being transmitted by the antenna.
Q. Inspection and Test Documentation Item 8
1) Make an appropriate entry in the aircraft maintenance records (i.e., logbook), including the date the ELT inspection and testing was satisfactorily completed.
2) For aircraft operating under Canadian authority, following satisfactory completion of performance testing, the date on which the test was performed shall be marked on the ELT external casing in a legible and permanent manner.
3. Fault Isolation
A. Self-Test
1) The self-test checks certain critical functions in the beacon. Results of the test are displayed by a series of indications (flash codes), where the status LED, remote switch LED and buzzer(s) activate for ½ second ON, followed by ½ second OFF. Multiple flash codes are separated by periods of 1.0 second. If no errors are present, a 2 second flash is presented as a "system ok" indication. This is suppressed if errors are present.
The self-test also emits a 121.5 MHz 2 cycle burst which can be monitored by an AM radio.
NOTE:
There are four distinct indications that 406 MHz and 121.5 MHz RF power emitted and a single indication that RF power was not emitted. This is confirmed by observing the sequence of local LED pulse, remote light or horn. Four pulses of ½ second of the local LED, remote light, and horn indicate RF was not emitted. A single 2 second or five, six or seven pulses of ½ second of the local LED remote light, and horn indicate RF was emitted.
Perform the self-test using the following steps:
1. Push switch lever to "SELF-TEST" position for approximately 1 second, until LED blinks one time, then release. Error codes will begin to display after about 1 second.
2. Regardless of how long the ELT has been in the active state, no self-test is performed at turn off using the 2-wire switch.
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ELT 345 (P/N: A3-06-2880)
BEEPS & FLASHES
1 2 3 4
5
6
7 8
TEST RESULTS
INDICATION
System OK
One pulse two seconds long of the status LED, remote
light, and buzzer. This pulse is suppressed if problems
are found during self-test.
Code not used in the ELT 345
Code not used in the ELT 345
Low output power
Bad load or faulty ELT
1) Terminate antenna cable at antenna
connection end w/50 load. Repeat self-test.
If error clears, proceed to step 3).
2) Terminate ELT output w/50 load. Repeat
self-test. If error persists, return to factory for
servicing cannot field repair. If error clears,
replace antenna cable.
3) Check coax cable and connectors for shorts
and opens, bad center pin, etc. Disconnect,
then reconnect cable. Repeat self-test.
4) Check antenna ground for low resistance
(should be <100 m )
5) Antenna should be 3' away from any vertical
metal.
6) Have antenna checked by factory.
No position data present (long message protocol only. Error is suppressed for short
messages)
Aircraft navigation system "OFF" Turn on navigation system.
Verify that ELT and navigation system baud rates
match. NMEA baud is 4800, AB Protocol baud is 9600.
Faulty system interface wiring or Check integrity of wiring and connections
connections.
G-Switch loop between pins 5 and 12 is not present
Jumper open
Verify D-Sub receptacle jumper is installed by
checking for less than 1 between pins 5 and 12.
Repair as necessary.
NOTE: When the installed jumper is removed, wait
at least 60+ seconds before a test is done to get a
G-switch `open' on the Self-Test (6 flash error)
Jumper missing
Install G-switch enable jumper between pins 5 and 12
in D-Sub harness receptacle.
Battery Check
Battery operating time is > 1 hr
Replace battery pack
Battery voltage low
Replace battery pack
Battery memory read-write error Repeat self-test. Replace battery pack if 7-flash
persists.
Protocol programming data
Missing data such as ELT S/N or ELT requires reprogramming w/appropriate data
aircraft tail number
Table 6 Self-test Error Codes
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ELT 345 (P/N: A3-06-2880)
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ELT 345 (P/N: A3-06-2880)
B. Troubleshooting
SYMPTOM Remote switch LED always on
(steady)
ELT will not turn off
Flash Errors
PROBABLE CAUSE
POSSIBLE SOLUTION
Improper wiring
Verify wiring
Short circuit
Verify integrity of all crimp and solder connections
Turn ELT "OFF" using control switch If ELT turns off:
Defective remote switch harness Check wiring continuity and repair
reset circuit wiring
as necessary
Defective remote switch
Replace remote switch
If ELT does not turn "OFF" using control switch:
ELT defective
Remove battery pack to disable ELT and return ELT to factory for
servicing
Please Refer to Table 6 Self-test Error Codes
Table 7 ELT Troubleshooting Guide
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) REMOVAL
1. ELT
A. ELT Removal 1) See Figure 9 ELT Removal Sequence.
Figure 9 ELT Removal Sequence 2) Disconnect the antenna coax cable.
NOTE:
Check the coax cable center conductor pin which is prone to retracting into the connector housing.
3) Remove remote switch harness D-sub plug. 4) Open the metal strap. 5) Slide the ELT up and out, and away from the mounting tray.
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2. Battery
ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
A. Battery Removal
CAUTION: CAUTION:
THE BATTERY PACK CONTAINS ELECTROSTATIC DISCHARGE (ESD) SENSITIVE COMPONENTS AND IT MUST BE HANDLED WITH CARE. IF POSSIBLE, WEAR A GROUNDED WRIST STRAP WHEN HANDLING THE BATTERY PACK DURING INSTALLATION ACTIVITIES. TAKE PARTICULAR CARE TO AVOID TOUCHING THE EXPOSED CIRCUIT BOARD AND CONNECTOR PINS ON THE BOARD.
TAKE CARE NOT TO DAMAGE THE SHORT POWER CABLE, WHICH CONNECTS THE BATTERY PACK TO THE ELT TOP COVER.
1) See Figure 10 Battery Pack Removal.
Figure 10 Battery Pack Removal
2) Place the ELT on a surface with the D-sub receptacle side up. 3) Remove the four screws from the top cover. 4) Carefully separate the top cover from the ELT, taking care not to put strain on the short power cable. 5) Disconnect the power cable from the small circuit board mounted in the top cover. 6) Place top cover of ELT on ESD mat, protecting the board from accidental electrostatic discharge. 7) Remove foam spacer from ELT main assembly and discard. 8) Remove battery pack from ELT main assembly.
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ELT 345 (P/N: A3-06-2880)
3. Material or Equipment Return
A. Shipment Information 1) If any material or equipment is to be returned to the factory, under warranty or otherwise, ACR Electronics, Inc. must be notified prior to shipment with the following information: a) Model and serial number of equipment being returned b) Date purchased c) Date placed in service d) Number of hours in service e) Nature and cause of failure f) Remarks, if any
B. Return Material Authorization 1) Upon receipt of such notice, ACR Electronics, Inc. will issue a Return Material Authorization (RMA) number which then authorizes return of the material or equipment to the following address:
Repair and Overhaul
ACR Electronics, Inc.
5757 Ravenswood Road
Fort Lauderdale, FL 33312-6603, USA
Phone: (954) 981-3333
Fax: (954) 983-5087
a) Failure to obtain a RMA number and provide the details listed above may cause unnecessary delay and/or rejection of the returned material or equipment.
b) All material or equipment returned to the factory must be freight prepaid. c) Acceptable methods of shipment for international return are Airborne, Burlington Air, DHL, Emery,
Federal Express, UPS International, and World Wide only.
NOTE:
Do not use international commercial airlines, such carriers may cause a loss of returned material or equipment.
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) INSTALLATION
1. Regulatory Requirements and Guidelines
A. For US Registered aircraft:
WARNING: FAILURE TO REGISTER THIS ELT WITH NOAA BEFORE INSTALLATION COULD RESULT IN A MONETARY FORFEITURE BEING ISSUED TO THE OWNER.
1) To enhance protection of life and property, it is mandatory that each 406.0-406.1 MHz ELT be registered with NOAA before installation and that information be kept up-to-date. In addition to the identification plate or label requirements, each 406.0-406.1 MHz ELT is provided on the outside with a clearly discernible permanent plate or label containing the following statement: "The owner of this 406.0-406.1 MHz ELT must register the NOAA identification code contained on this label with the National Oceanic and Atmospheric Administration (NOAA), whose address is:
NOAA/SARSAT Beacon Registration
NSOF E/SPO53
1315 East West Hwy
Silver Spring, MD 20910-3282
2) Aircraft owners must advise NOAA in writing upon change of aircraft or ELT ownership, or any other change in registration information. Fleet operators must notify NOAA upon transfer of ELT to another aircraft outside of the owner's control, or another change in registration information. NOAA will provide registrants with proof of registration and change of registration postcards.
B. TSO C126b, Paragraph D 1) TSO approval of the ELT does not constitute installation approval. All ELT installations are subject to field approval for a given airframe by either an approved FAA DER or FAA FSDO. For installations outside the US, contact your local civil aviation regulatory agency for details. 2) The remote switch is a requirement of TSO C126b and installation is mandatory. 3) The buzzer is a requirement of TSO C126b and installation is mandatory.
C. FAA 1) This manual constitutes supporting data, as described in AC43.9-1, Paragraph 6.h.(2) and AC 43-210, Chapter 2, Paragraph 201(a)(6), and as such may be used as support for FAA field approval of the ELT installation. 2) In addition to the procedures outlined herein and in accordance with FAR Part 43, the installer must adhere to the aircraft manufacturer's instructions and recommendations and the guidelines provided by FAA Advisory Circular AC 43.13-2 "Acceptable Methods, Techniques, and Practices - Aircraft Alterations," specifically Chapters 1 through 3, 11, and 13. 3) By signing the aircraft logbook and FAA Form 337, the installer is stating the installation has been performed in accordance with current FAR requirements and the procedures outlined therein. The completed Form 337 is provided to the FAA and also becomes a permanent part of the aircraft maintenance records in accordance with AC43-9, Paragraph 17.
D. Canada 1) All installations must be performed in accordance with Canadian Aviation Regulations (CAR) Part V, Chapter 551, § 551.104.
E. Other Countries
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1) Installations in aircraft outside of the United States and Canada must be performed in accordance with applicable regulatory authority rules and regulations.
F. RTCA
1) DO-204A, § 3.1.8 guidelines for mounting an ELT:
a) The ELT unit shall be mounted to primary aircraft load-carrying structures, such as trusses, bulkheads, longerons, spars, or floor beams (not aircraft skin) or a structure that meets the requirements of the following test:
b) The mounts shall have a maximum static local deflection no greater than 2.5 mm when a force of 450 newtons (100 lbf) is applied to the mount in the most flexible direction. Deflection measurements shall be made with reference to another part of the aircraft not less than 0.3 meters nor more than 1.0 meters from the mounting location.
2) DO-182, § 6.2.2.b recommends that:
a) To maximize the probability of the ELT transmitting a detectable signal after a crash, all ELT system components, which must survive a crash intact, e.g. transmitter and external antenna, should be attached to the airframe in such a manner that the attachment system can support a 100 g load, (ELT weight x 100, ELT antenna weight x 100, etc.) applied through the center of gravity of the component (ELT, antenna, etc.) in the plus and minus directions of the three principal axes of the aircraft.
b) Post-crash critical components of the ELT system, e.g. transmitter and external antenna, should be mounted as close to each other as possible.
c) The antenna coax cable should not cross any production breaks, e.g., major structure sections, such that the ELT and antenna are in the same section of the aircraft and as close together as possible.
d) If the ELT and external antenna are on opposite sides of an airframe production break, the components should be secured to each other by a tether that can support a 100 g load (ELT weight x 100). The interconnecting antenna-to-ELT coax cable should have sufficient slack on both ends that it will not be subjected to any tensile load and should be tied loosely to the tether.
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
2. Mounting Tray
A. Location CAUTION:
MANY ORIGINAL ELT INSTALLATIONS ARE INADEQUATE AS FAR AS UNIT LOCATION AND SURFACE RIGIDITY ARE CONCERNED. BECAUSE OF THE CRITICAL FUNCTION AN ELT PERFORMS, IT IS IMPORTANT THE INSTALLATION FOLLOWS THE INSTRUCTIONS AND RECOMMENDATIONS HEREIN.
CAUTION:
THE MOUNTING SURFACE MUST BE EXTREMELY RIGID. MOUNTING AN ELT DIRECTLY TO THE AIRCRAFT SKIN, FOR EXAMPLE, IS UNACCEPTABLE.
CAUTION:
AVOID LOCATING THE ELT WHERE IT WILL BE SUBJECTED TO UNPROTECTED EXPOSURE TO HARSH CHEMICAL FLUIDS SUCH AS DEICING COMPOUNDS. THESE TYPES OF CHEMICAL FLUIDS CAN PROMOTE CRACKING AND FRACTURING OF THE ELT MOUNTING FRAME AND HOUSING COMPONENTS BY DEGRADING THE STRUCTURAL INTEGRITY OF THESE COMPONENTS. THESE SAME CHEMICAL AGENTS MAY ALSO CAUSE CORROSION OF ELECTRICAL CONNECTIONS.
NOTE:
Statistics show that the tail section of an airplane is likely to be less damaged during a crash; therefore, providing a good mounting environment for the ELT.
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Figure 11 ARTEX ELT 345 Outline & Dimensions
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Figure 12 ELT 345 Metal Strap Minimum Clearance Dimensions
1) Select a suitable location for the ELT mounting tray (see Figure 11 ARTEX ELT 345 Outline & Dimensions on page 40 and Figure 12 ELT 345 Metal Strap Minimum Clearance Dimensions above).
2) Mount the ELT as far aft as practical, but where it can be easily retrieved for maintenance. 3) Additional installation guidance may be found in AC 43.13-2, Chapter 2, § 28, which specifically addresses
ELT installations.
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B. Installation
1) See Figure 13 Typical Mounting Tray Installation.
2) Install the necessary mounting structure as appropriate.
3) Align the mounting tray (A3-06-2882) on the mounting structure, such that the arrow on the tray is within 10° of the longitudinal axis of the aircraft and pointing in the direction of flight.
4) Mark and drill the four mounting holes with a #19 or 4.25 mm drill. Refer to Figure 11 on page 40 for the mounting hole pattern.
5) Install the mounting tray as shown in Figure 13 (installation kit: 455-7423).
NOTE:
The use of substitute mounting hardware is acceptable provided the hardware used meets or exceeds the strength and corrosion resistance of the original hardware.
6) Torque screws to 12±1 lb-in (136 ±11 N·cm).
Figure 13 Typical Mounting Tray Installation
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3. Antenna
ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
A. General
1) Use only antennas approved for use with the ARTEX ELT 345. The ELT will not work properly without being connected to an antenna for which it was designed.
2) Verify the antenna selected matches the requirements of the specific installation. Considerations include aircraft maximum rated speed, location restrictions, and any other considerations specific to the installation.
3) Per FAA TSO C126b and ETSO-C126a, ELTs must be installed with only the components that have been certified by either the manufacturer of the unit or via a Type Certificate authorization done by the airframe manufacturer. Contact ARTEX Technical Support for further information regarding component and accessory selection.
B. Location
1) Select a suitable location for the antenna.
a) Place the antenna in a location where the antenna can be installed vertically and with at least 32 inches (0.8 m) of clearance from other antennas, particularly VHF, in accordance with RTCA/DO-204, § 3.1.10.2.
NOTE:
Detailed location guidance may be found in AC 43.13-2, Chapter 3, which recommends a minimum distance of 36 inches (0.9 m) clearance between antennas.
C. Installation General Info
NOTE:
Per FAA TSO C126b, "Those installing this article, on or in a specific type or class of aircraft, must determine that the aircraft installation conditions are within the TSO standards. TSO articles must have separate approval for installation in an aircraft."
CAUTION:
ARTEX CANNOT VERIFY APPROPRIATE ANTENNA SELECTION PER EACH AIRFRAME. MANY CONSIDERATIONS MUST BE EVALUATED DURING THE ANTENNA SELECTION PROCESS, SUCH AS DYNAMIC / STATIC LOADING. CERTAIN SPECIAL CONSIDERATIONS NEED TO BE ACCOUNTED FOR SUCH AS AIRFLOW SPEED OVER THE ANTENNA SURFACES (FRONTLOAD / SIDELOAD). CONSULT FAA AC 43.13-2 AND AIRFRAME MANUFACTURER FOR ANTENNA INSTALLATION PRACTICES AND REQUIREMENTS. CONTACT ARTEX TECHNICAL SUPPORT FOR MORE INFORMATION.
WARNING:
PER FAA AC 43.13-2: "PAINTING AN ANTENNA OR APPLY PROTECTIVE COATINGS OR DEVICES THAT ARE NOT APPROVED ARE NOT ALLOWED [UNDER THIS AC]. PAINT IS AN RF DE-TUNER. IF AN ANTENNA IS PAINTED IN THE FIELD, PAINT TYPE AND PAINT THICKNESS PRESENT UNCONTROLLED VARIABLES THAT WILL AFFECT AN ANTENNA'S PERFORMANCE AND MAY RESULT IN THE ANTENNA NO LONGER MEETING ITS SPECIFICATIONS OR TECHNICAL STANDARD ORDER (TSO)." ARTEX DOES NOT AUTHORIZE OPERATORS OR OUTSIDE MAINTENANCE ORGANIZATIONS TO PERFORM FIELD REPAIRS OR PAINTING. CONTACT ARTEX TECHNICAL SUPPORT FOR MORE INFORMATION.
NOTE:
Refer to the airframe manufacturer's written instructions and AC 43.13-2, Chapter 3 for antenna installation practices and requirements.
1) Prepare antenna mounting surface to ensure good ground contact.
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2) Install a doubler plate if necessary to meet rigidity requirements. A 20 lb (9.1 kg) force applied to the antenna in all directions should not cause an appreciable distortion in the aircraft skin.
3) Install a ground plane if necessary. Please follow AC 43.13-2B.310 when installing antenna on composite or fabric covered wood airframes.
4) Drill the antenna mounting holes and coax connector hole referring to Figure 14 below.
5) Mount the antenna referring to Figure 14 below for hardware requirements, torque, and other applicable installation requirements.
6) Apply a small fillet of RTV sealant around periphery of antenna base to protect against moisture.
7) A coax cable is provided as part of some ELT kits.
4. Remote Switch A. Location NOTE:
Figure 14 A3-06-2892-1 Antenna Outlines and Dimensions
The ELT 345 must be installed using a 2-wire remote switch, ARTEX P/N A3-06-2759. Note that the 2-wire remote switch does not require a connection to the aircraft power to operate.
1) Select a suitable switch location in the cockpit. The switch needs to be visible and accessible, where the pilot can easily reach the switch and notice the indicator LED.
2) The switch assembly requires a panel area of approximately 2.0 x 1.3 in. (51 x 33 mm). Figure 15 shows the dimensions. The clearance behind the panel must allow for the mating connector and harness wires, as well as the switch depth.
Figure 15 Remote Switch Outline and Dimensions B. Installation
1) Mark the cutout on the cockpit panel.
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2) Fit the switch assembly into the cutout and mark the four screw holes, then remove the switch.
3) Drill the screw holes with a #28 or 3.6 mm drill.
4) Install the switch assembly using the hardware provided in the remote switch installation kit .
5) Apply the "For Aviation Emergency Use Only/Unauthorized Use Prohibited" placard (ARTEX P/N 591-0428, provided in the installation kit).
6) A remote switch is a requirement of RTCA DO-204a and TSO C126b.
5. Buzzer
A. Location
CAUTION:
PLACING THE BUZZER IN THE COCKPIT IS NOT RECOMMENDED DUE TO THE POTENTIAL FOR DISTRACTION. THE BUZZER PRODUCES A LOUD, SIREN-TYPE SOUND WHEN THE ELT IS ACTIVATED. SINCE THE BUZZER OPERATES IN TANDEM WITH THE COCKPIT LED, IT WOULD ONLY SERVE AS A REDUNDANT WARNING INDICATOR IN THE COCKPIT.
1) Select a suitable location for the buzzer.
NOTE:
The buzzer may be located anywhere in the aircraft; however, the recommended location is near the ELT, as the buzzer is loud enough to be heard outside the aircraft when the engine(s) is not running. When the engine(s) is running, the LED on the cockpit remote switch assembly will warn the pilot the ELT is active.
B. Installation
1) Refer to AC 43.13-2 for fabrication and installation guidance.
2) Fabricate a support bracket for the buzzer. See Figure 16 Buzzer Outline and Dimensions.
3) Mount bracket and install buzzer. Either the panel mounting nut or flanges can be used to mount the buzzer.
Figure 16 Buzzer Outline and Dimensions
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6. Wiring
ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880)
A. General Considerations and Recommendations
CAUTION:
IF GROUND OR OTHER CONNECTIONS ARE BROKEN OR OTHERWISE DAMAGED, THE ELT IS STILL CAPABLE OF AUTOMATIC ACTIVATION; HOWEVER, THE COCKPIT REMOTE SWITCH MAY BE INCAPABLE OF RESETTING THE ELT AND OPERATION MAY NOT BE INDICATED ON THE REMOTE SWITCH LED.
CAUTION:
INCORRECT TERMINATION OF THE WIRING IN THE CONNECTORS MAY DAMAGE THE ELT, CAUSE TRANSMISSION ISSUES, OR RESULT IN A NON-FUNCTIONING REMOTE SWITCH. VERIFY THE WIRING AGAINST THE WIRING DIAGRAM AND PERFORM A CONTINUITY CHECK TO CONFIRM GOOD CONNECTIONS AND PROPER PIN LOCATIONS.
CAUTION:
TO PREVENT INADVERTENT ELT ACTIVATION OR POSSIBLE COMPONENT DAMAGE, DO NOT CONNECT THE HARNESS TO THE ELT OR COCKPIT REMOTE SWITCH UNTIL ALL POWER AND GROUND WIRING CONNECTIONS ARE COMPLETED AND VERIFIED.
1) The following wiring and grounding considerations and recommendations are applicable:
a) Minimum 22 AWG wire size.
b) Shielding is recommended to help prevent EMI and RF interference.
c) Use high quality conductor meeting MIL-W-16878, M22759, M27500, or a commercial equivalent acceptable for use in aircraft applications.
d) Provide a "Drip Loop" in the remote switch harness connection to the ELT to divert moisture from the Dsub receptacle.
e) Provide a "Service Loop" in the remote switch harness connection to the remote switch assembly, such that the assembly can be withdrawn from the panel far enough to easily disconnect the harness plug.
2) Refer to the following schematics for suggested installation wiring.
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Figure 17 Typical 2-Wire Installation for Unshielded Harness
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Figure 18 Typical 2-Wire Installation for Shielded Harness
B. Remote Switch Harness Fabrication 1) See Figure 19 Remote Switch Harness Arrangement. 2) Allow enough slack to provide a drip loop at the ELT end and a service loop at the cockpit remote switch end. Refer to the appropriate wiring diagram. 3) Strip approximately 0.15 in. (3 mm) of insulation from the remote switch end of each of the harness cable wires. Dress and tin the bare wires to prevent the strands from fraying during terminal crimping operations. 4) Support for the harness wiring can be referenced in AC 43.13-1, Chapter 11, § 9 through 12.
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5) Install the buzzer connecting wires.
NOTE:
The buzzer ground and the ELT ground must be common. The buzzer ground can be connected directly to the ELT D-sub ground.
6) Crimp female terminal pins (151-6628) to the cockpit remote switch end using Molex crimp tool 638113300, or an equivalent tool for 0.062 in. terminal pins.
Figure 19 Remote Switch Harness Arrangement
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ELT 345 (P/N: A3-06-2880)
C. ELT D-Sub Plug Installation
1) See Figure 20 Harness Plug Assembly.
2) Select a rubber grommet, supplied as part of the D-Sub housing kit (150-1127), that fits snugly around the harness wiring.
3) Feed the wiring harness, ground wire, and buzzer power wire through the grommet, such that the raised collar end of the grommet is positioned toward the D-sub receptacle end of the harness.
4) Slide the grommet away from the cable and other conductor ends, such that it does not interfere with soldering the conductors to the plug (150-1130).
5) Buzzer ground conductor may be soldered to the cable shield or ground pin for composite airframe installations (see Figure 18 Typical 2-Wire Installation for Shielded Harness on page 48 for composite airframe wiring diagram).
6) Solder a short jumper wire (G-switch loop) between pins 5 and 12 of the harness D-sub receptacle.
CAUTION:
THE ELT WILL NOT AUTOMATICALLY ACTIVATE IF THE JUMPER G-SWITCH LOOP IS NOT PROPERLY INSTALLED IN THE ELT D-SUB RECEPTACLE.
7) Note the pin locations of the harness D-sub receptacle plug and solder the harness wires in place, referring to the appropriate wiring diagram.
8) Fit the plug into one of the housing halves, positioning the grommet such that it fits into the recess on the cable end of the housing.
9) Install the bracket washers onto the thumbscrews. 10) Insert thumbscrews into lower housing half. 11) Fit the other housing half into place. 12) Screw housing halves together using the screws and nuts supplied as part of the housing kit.
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Figure 20 Harness Plug Assembly
D. Cockpit Remote Switch 9-Pin Plug Installation 1) Insert the wiring pins into the Molex 9-pin cockpit remote switch plug. Refer to Figure 17 Typical 2-Wire Installation for Unshielded Harness on page 47, Figure 18 Typical 2-Wire Installation for Shielded Harness on page 48.
NOTE:
Terminal pins may be removed from the plug using Molex extraction tool 11030002 or equivalent.
E. Antenna Connection
1) Install the supplied coax cable to the antenna. Any excess cable should not be removed but "looped and stowed" in a convenient location. A custom length coax cable, between 0.5 and 1.0 dB maximum loss, may be fabricated if the cable provided is not adequate. ACR suggests using RG-142 coax cable.
F. Airframe Ground Connections
1) Connect the ground wires to the airframe as described in AC 43.13-1, Chapter 11, § 15, as applicable. Refer to Figure 17 Typical 2-Wire Installation for Unshielded Harness on page 47, Figure 18 Typical 2-Wire Installation for Shielded Harness on page 48as appropriate.
G. ELT Programming
NOTE:
Programming is performed by customer if so equipped or through a programming sheet supplied to ACR Electronics, Inc. with an ELT order. For information on ELT programmers and training, please contact ACR Electronics, Inc.
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1) ELTs that are serialized with LONG Cospas-Sarsat protocol will receive external navigation data if available. 2) ELTs programmed with SHORT Cospas-Sarsat protocol will not accept navigation data. 3) When the ELT 345 is programmed with 4800 baud it will only accept NMEA, and when programmed with
9600 baud it will only accept Aviation Protocol. H. RS-232 Acceptable Nav Data
1) NMEA 0183 baud rate is 4800. 2) Aviation protocol baud rate is 9600. 3) Programing of the ELT 345 will determine the input of 4800 baud NMEA navigation data or 9600 baud
Aviation protocol navigation data. 4) The ELT 345 will parse GGA, GLL and RMC simultaneously. Output configurations that write GGA, GLL or
RMC sentences at 4800 baud as specified in NMEA 0183 will be suitable. 5) GPGGA is recommended if available.
7. ELT Installation and Test
A. Installation 1) See Figure 21 ELT Installation Sequence.
Figure 21 ELT Installation Sequence
2) Insert the ELT into the mounting tray at an angle, engaging the locking ears at the tail end first. Press the ELT down until it is fully seated in the mounting tray.
3) Lock the Mounting Tray Latch in place to secure the ELT body. 4) Install two sealant strips (850-0814) into the receptacle of the ELT. Peel the adhesive backing from the
strips and stack one on top of the other. Push the pins through the strips. 5) Connect the harness to the ELT, taking care to insert the D-sub receptacle straight in. Secure the D-sub
receptacle with the thumbscrews.
NOTE: Y1-03-0282 Rev. L
Care must be taken in the cable connection process to avoid shorting any pins to ground or each other. Under some circumstances, the shorting or grounding of the pins signal the ELT as if the remote switch was activated. This may result in ELT transmissions or setting the ELT into a monitoring condition. This may result in the ELT exhibiting battery runtime in excess of regulations. To avert this condition, after the harness connection is complete the
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installer shall activate the self-test on the installed unit. This action will need to be performed whenever the harness is disconnected and then re-connected.
6) Connect the antenna coax cable to the ELT.
7) Test the ELT installation in accordance with the requirements of Inspection and Test Procedures on page 25. Verify digital message (406 MHz burst) per procedures in Current Draw Test on page 29.
B. Harness ELT D-Sub Plug Sealing
1) After system operation is verified, with no errors displayed, it is suggested that the harness D-sub receptacle to the ELT be sealed against moisture. This is best accomplished by encapsulating the exposed connections in silicone sealant. ACR recommends Dow Corning® 4 Electrical Insulating Compound or an equivalent meeting SAE AS-8660 (MIL-S8660C)
a) Disconnect the remote switch harness D-Sub plug from the ELT.
b) Separate the D-Sub housing halves.
c) Inject sealant into the back side of the plug, so that sealant surrounds all exposed electrical connections and the back of the plug.
d) Reinstall the housing halves.
e) Coat the mating pins/receptacles lightly with sealant.
f) Re-connect the harness plug to the ELT.
C. Installation Documentation
1) Update logbook (aircraft records) entries and submit FAA Form 337, along with any supporting data required by the FAA for approval of the installation, as applicable.
2) In countries other than the United States, make appropriate aircraft records entries and submit documentation as required for installation approval in accordance with national regulatory authorities.
8. Battery Pack Installation
A. Battery Installation and Reinstallation
CAUTION:
THE BATTERY PACK CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE (ESD) COMPONENTS AND, AS SUCH, MUST BE HANDLED WITH CARE. IF POSSIBLE, WEAR A GROUNDED WRIST STRAP WHEN HANDLING THE BATTERY PACK DURING INSTALLATION ACTIVITIES. TAKE PARTICULAR CARE TO AVOID TOUCHING THE EXPOSED CIRCUIT BOARD AND CONNECTOR PINS ON THE BOARD.
1) This subtask applies to reinstallation of an existing battery that was removed for inspection and testing, as well as fitting a new battery.
2) See Figure 22 Battery Pack Installation.
O-ring
Figure 22 Battery Pack Installation
3) Remove the old O-ring from the front assembly and discard. Apply Lubriplate no. 1200-2silicone grease evenly on the new O-ring and insert it carefully into the O-ring groove. Check the O-ring to ensure it is in the groove and not exposed to pinching, when the front face is replaced after battery replacement. DO NOT USE PETROLEUM BASED GREASE.
4) Install the new battery pack after the battery lead is connected. Carefully slide in the new foam spacer on top, feeding the battery lead through the bigger hole.
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ELT 345 (P/N: A3-06-2880) 5) Carefully slide the circuit board down in the outermost of the two grooves of the battery
compartment until the battery lead can be connected to the front assembly. Note that there is no pinching of the O-ring when properly seated. 6) The receptacle should "click" into place when properly mated to the plug.
7) When the battery lead is connected, the ELT will emit three beeps.
NOTE:
If the ELT activates when power is connected, reset by toggling the ELT local control switch to ON and back to "ARM" after 1-2 seconds.
8) Replace the four screws. Apply a 3 in-lb. torque on the screws. Tighten as below before torque is applied in the same way.
9) Affix the supplied expiration date label in the place of the expired one.
10) Reinstall the ELT in its mount, secure it and connect the antenna leads and remote control wire harness.
11) Place the manual switch in the "ON" position and monitor the ELT's operation with a communication receiver tuned to 121.5 MHz. If the ELT can be heard, move the switch back to the "OFF" or "ARMED" position. Verify that there is no 7-flash error code displayed on the status LED; see applicable ELT Manual for details on testing ELT.
12) Enter in the airframe logbook the date of the installation of the new battery pack and the next replacement date. The sticker enclosed with battery pack can be used for this purpose.
13) Do not discard the old battery pack in fire or flame. Dispose of the battery pack as per local environmental regulations.
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ELT 345 (P/N: A3-06-2880) ILLUSTRATED PARTS LIST
1. Introduction
A. Purpose 1) This illustrated parts list (IPL) illustrates and lists the spare parts, with attaching hardware, applicable to the ELT 345. 2) Parts and components not listed herein are not field replaceable and ELT repairs requiring parts outside the scope of this manual must be accomplished by the manufacturer.
B. IPL Usage Guide 1) If the part number is not known: a) Find the part in the IPL Figure illustration. b) Note the item number assigned to the part. c) Refer to the associated parts list and find the item number in the "Fig # & Item" column. 2) If the part number is known: a) Refer to the parts list and find the part in the "Part #" column. b) Note the figure number and item number assigned to the part. c) Refer to the illustration in the applicable IPL figure to find attaching hardware and related assembly parts. 3) In cases where multiple item numbers are shown on an illustration for the same item, there is more than one part number option associated with that item.
2. Manufacturer Name and Address
A. Ordering Information 1) Parts may be ordered from ACR Electronics, Inc., or any authorized dealer.
CONTACT INFORMATION: Sales, ACR Electronics, Inc. / ARTEX
Products 5757 Ravenswood Rd
Fort Lauderdale, FL 33312-6603 USA
Phone: (954) 981-3333
Fax: (954) 983-5087
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Figure 23 ELT 345 Main Assembly and Installation
ITEM 01 03 05 06 -
PART # A3-06-2880 A3-06-2883 201-0402 A3-06-2882 201-0810 246-0008 241-0832 A1-20-1798
DESCRIPTION ARTEX ELT 345 Main Assembly Lithium Battery Pack Screw, 6-32 x 7/8, PHL, Truss, SS Mounting Tray Screw, PHL, 8-32 x 5/8", SS Washer, Flat, ½", SS, #8 Nut, Hex, 8-32 x ¼", SS Label, LiMnO2, ARTEX ELT 345
QTY 1 1 4 1 4 4 4 1
Table 8 Main Assembly Components
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Figure 24 Harness Components
ITEM 01 02 03 -
04
PART # A3-06-2759 201-0408 247-0400 241-0440 591-0428 151-5009 151-6628 150-1130 150-1127 850-0814 201-0810 241-0832 246-0008 452-6505
DESCRIPTION Switch, cockpit remote Screw, PHL, 4-40 x ¼", SS Washer, internal lock, SS, #4 Nut, 4-40 x ¼", hex, SS Label, ELT Cautionary Use Advisory Plug, 9-pin Terminal, crimp, female, 0.062" dia. Conn, D-sub, 15-pin, Female, Solder cups Housing, D-sub, 15-pin, grommet, thumbscrews Sealant strip, D-sub receptacle Screw, PHP 8-32 x 5/8, SS Nut Washer Buzzer (ELT audio alert)
Table 9 Harness Components
QTY 1 4 4 4 1 1 4 1 1 2 4 4 4 1
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1
Figure 25 Antennas
ITEM 01
PART # A3-06-2892-1
DESCRIPTION RAMI Whip Ant (black) w/6' Coax Cable
Table 10 Antennas
QTY 1
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ARTEX PRODUCTS / ACR ELECTRONICS, INC. DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 345 (P/N: A3-06-2880) APPENDIX A ELT REGISTRATION
1. Background Information
A. Hex ID Code (15-Hex ID) 1) A Hexadecimal Identification (Hex ID) is a series of digits consisting of letters A-F and numbers 0-9 that identifies an individual beacon. 2) The Hex ID is a message that is programmed into the beacon and is transmitted when the beacon is activated and allowed to operate for approximately 50 seconds, or longer. 3) The 15 digit version of the Hex ID (15-Hex ID) is labeled on the outside of the beacon. 4) Each 406 MHz ELT is programmed with a unique hex ID code (i.e., registration code) that is transmitted to the SAR satellite system. At a minimum, this code provides information regarding: a) Unique aircraft or ELT identification, b) Country of origin, and c) Latitude and longitude position data, when connected to aircraft navigation system and programmed with a location protocol. 5) If the beacon is reprogrammed to a new protocol, aircraft tail number, different country, etc., the 15 Hex ID changes and the beacon requires relabeling.
2. Registration
A. Responsibility 1) It is the responsibility of the aircraft owner to register the ELT. a) If an ELT is moved to a different aircraft (i.e., an aircraft other than the one it was originally installed on), and/or the aircraft is registered in a new country, the ELT must be re-programmed and reregistered. b) If the aircraft is registered in a new country, the ELT must be re-programmed and re-registered. c) The product label must be re-marked with the new HEX ID code to indicate new programming, if applicable.
B. Required Information 1) The following information is required when registering an ELT: a) The unique Hex ID code printed on the ELT product label, b) The information listed below: 1. Owner's name, 2. Address, 3. Telephone number, 4. Aircraft type and registration number 2) The information (i.e., address, telephone number, etc.), filed as part of the registration process, must be kept up to date.
C. Registration Information Resources 1) Refer to COSPAS-SARSAT documents G.005 and S.007 for information regarding ELT programming and registration. These documents are available at www.cospas-sarsat.org.
D. Where to Register 1) In the United States, the National Oceanic and Atmospheric Administration (NOAA) is the registration agency. 2) Specific registration web sites and information may be found at:
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a) The ARTEX products web site at www.acrartex.com, which has links to on-line registration sites and also a link to registration forms and instructions for a number of countries.
b) The NOAA ELT registration web site at beaconregistration.noaa.gov where an ELT may be directly registered in the United States.
NOTE:
NOAA may also be contacted by mail at:
SARSAT Beacon Registration
NSOF, E/SPO53
1315 East West Hwy
Silver Spring, MD 20910-3282
or by phone at 1-888-212-7283 or fax at 301-817-4565.
3) In other countries, the national civil aviation authority in the applicable country should be contacted to obtain registration information.
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