COBHAM C406-2 SERIES Abbreviated Component Maintenance Manual
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COBHAM C406-2 SERIES Abbreviated Component Maintenance Manual

COBHAM C406-2 SERIES Abbreviated Component Maintenance Manual

Emergency locator transmitter
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EMERGENCY LOCATOR TRANSMITTER
Abbreviated Component Maintenance Manual
This manual includes data for the equipment that follows:
Component
Emergency Locator Transmitter
Emergency Locator Transmitter
C406-2 SERIES
Part No.
453-5000
453-5001
25-62-11
Model No.
C406-2
C406-2HM
Wulfsberg Electronics Division
Wulfsberg Electronics Division
6400 Wilkinson Rd., Prescott, AZ 86301
6400 Wilkinson Rd., Prescott, AZ 86301
Cage Code: 1B7G3
Cage Code: 1B7G3
570-5000 Rev. C
Initial Issue JUN 30/1999
Page 1 of 90
APR 06/10

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Summary of Contents for COBHAM C406-2 SERIES

  • Page 1 C406-2 SERIES EMERGENCY LOCATOR TRANSMITTER Abbreviated Component Maintenance Manual This manual includes data for the equipment that follows: Component Part No. Model No. Emergency Locator Transmitter 453-5000 C406-2 Emergency Locator Transmitter 453-5001 C406-2HM Wulfsberg Electronics Division Wulfsberg Electronics Division 6400 Wilkinson Rd., Prescott, AZ 86301 6400 Wilkinson Rd., Prescott, AZ 86301...
  • Page 2 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) PROPRIETARY INFORMATION This document contains proprietary information and such information may not be disclosed to others for any purpose, nor used for manufacturing purposes without written permission from Wulfsberg Electronics.

  • Page 3: Record Of Revisions

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) RECORD OF REVISIONS REV NO. DCN NO. DCN DATE REV NO. DCN NO. DCN DATE RELEASE Jun 30/1999 ECO 1493 Sep 07/2000 ECO 1523 Oct 18/2000 DCN 1641...
  • Page 4 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) THIS IS A BLANK PAGE 25-62-11 Page 4 of 90 APR 06/10...

  • Page 5: Service Bulletin List

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SERVICE BULLETIN LIST SERVICE ISSUE MANUAL MANUAL SUBJECT BULLETIN NO DATE REV NO REV DATE 25-62-11 Page 5 of 90 APR 06/10...
  • Page 6 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) THIS IS A BLANK PAGE 25-62-11 Page 6 of 90 APR 06/10...

  • Page 7: List Of Effective Pages

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) LIST OF EFFECTIVE PAGES SUBJECT PAGE DATE SUBJECT PAGE DATE Title Page Apr 06/10 Description and Operation Apr 06/10 Notices Apr 06/10 (cont.) Apr 06/10 Record of Revisions...
  • Page 8 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBJECT PAGE DATE SUBJECT PAGE DATE Installation Apr 06/10 Appendix A Apr 06/10 (cont.) Apr 06/10 Apr 06/10 Apr 06/10 Illustrated Parts List Apr 06/10 Apr 06/10 Apr 06/10...

  • Page 9: Table Of Contents

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TABLE OF CONTENTS RECORD OF REVISIONS ............3 SERVICE BULLETIN LIST.
  • Page 10 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) C. Antennas ............35 Table 4.
  • Page 11 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) INSTALLATION 1. Regulatory Requirements and Guidelines ......... 55 A.
  • Page 12 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) APPENDIX A – ELT REGISTRATION 1. Background Information ........... . 81 A.

  • Page 13: List Of Figures

    C406-2 Series ELT and Mounting Frame Assembly ....... . 28...
  • Page 14 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) THIS IS A BLANK PAGE 25-62-11 Page 14 of 90 APR 06/10...

  • Page 15: Introduction

    Installation Registration Illustrated Parts List In the United States, the C406-2 Series ELT must be installed and maintained in accordance with the requirements herein and 14 CFR, FAR Parts 43, and 91; and other airworthiness requirements, as applicable. In Canada, the C406-2 Series ELT must be installed and maintained in accordance with the requirements herein and Canadian Aviation Regulations (CAR), Part V, Paragraph 551.104 and...
  • Page 16 ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) C406-2 Series ELT installation and maintenance in all other countries must comply with the requirements herein and applicable national airworthiness requirements. The accessories (i.e., remote switch and antennas) addressed in this manual are the accessories most commonly associated with the C406-2 Series ELT.

  • Page 17: Model Descriptions

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-990-802 2. Model Descriptions SUBTASK 25-62-11-990-001 C406-2 The C406-2 is a type AF (Automatic Fixed) ELT, which transmits on 121.5, 243.0, and 406 MHz. The ELT is enclosed within a multi-piece mounting frame consisting of a mounting tray, protective top cover and mounting frame cap.

  • Page 18: Approvals

    LITHIUM BATTERY SAFETY CONCERNS INCLUDE THE POSSIBILITY OF FIRE, VENTING VIOLENTLY, AND VENTING OF TOXIC GASES. The lithium battery pack used on the C406-2 Series ELT is certified under TSO C142. NOTE: Details of TSO certification are available in the “452-0133 - 406 Lithium Battery Pack TSO C142 Report”...

  • Page 19: Table 1. Environmental Categories Breakdown

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Table 1. Environmental Categories Breakdown CATEGORY SECTION DESCRIPTION Temperature/Altitude 4.5.4 In-Flight Loss of Cooling Temperature Variation Humidity 7.0/8.0 Operational Shock and Crash Safety/Vibration Explosion 10.0 Waterproofness 11.0 Fluids Susceptibility 12.0...

  • Page 20: Frequency Allocations

    SUBTASK 25-62-11-990-002 Discussion The 406 MHz transmitter frequency of the C406-2 Series ELT was originally 406.025 MHz. In order to comply with COSPAS-SARSAT frequency allocation requirements, changes to the 406 MHz frequency may occur since the original release of this product.

  • Page 21: List Of Acronyms, Abbreviations, And Definitions

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-990-805 5. List of Acronyms, Abbreviations, and Definitions SUBTASK 25-62-11-990-001 Term Definition Advisory Circular – A Federal Aviation Administration (USA) bulletin with special information. For the purposes of this document, the acro- nym AC does not refer to electrical alternating current.
  • Page 22 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) EUROCAE European Organization for Civil Aviation Equipment – EUROCAE docu- ments are widely referenced as a means of compliance to European Technical Standard Orders (ETSOs) and other regulatory documents.
  • Page 23 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Search and Rescue SCREEN ROOM The term “Screen Room”, within the context of this document, refers to a room designed to suppress RF signals, such that the broadcast of an ELT placed in the screen room cannot reach the SAR satellite sys- tem.

  • Page 24: References

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-990-806 6. References SUBTASK 25-62-11-990-001 Regulatory Documents 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.

  • Page 25: Other Documents

    • 570-1000, “ELT Test Set (ETS) Operation Manual” • 570-4602, “ELT/NAV Interface Abbreviated Component Maintenance Manual” • 572-0005, Issue 2, “C406-2 Series TSO Report” • 572-0043, “452-0133 - 406 Lithium Battery Pack TSO C142 Report” 25-62-11 Page 25 of 90...
  • Page 26 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) THIS IS A BLANK PAGE 25-62-11 Page 26 of 90 APR 06/10...

  • Page 27: Description And Operation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) DESCRIPTION AND OPERATION TASK 25-62-11-870-801 1. Description SUBTASK 25-62-11-870-001 Functional Overview The ELT automatically activates during a crash and transmits the standard sweep tone on 121.5 and 243.0 MHz. Approximately every 50 seconds, for up to 520 milliseconds (long message protocol), the 406 MHz transmitter turns on.

  • Page 28: Components

    SUBTASK 25-62-11-870-002 Components The C406-2 Series ELT main assembly is housed in a high impact, fire resistant, polycarbonate plastic case, which is enclosed in a protective mounting frame assembly made of similar material. See "Figure 2. C406-2 Series ELT and Mounting Frame Assembly".

  • Page 29: Figure 3. Remote Switch Front View

    Buzzer". Figure 4. Buzzer The battery pack for the C406-2 Series ELT consists of four “D” size lithium manganese dioxide cells connected in series. To prevent the cells from being charged, diodes are connected across each cell and fuses are connected to the output. See "Figure 5. Battery Pack Assembly".

  • Page 30: Figure 6. Antennas

    ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Four dual-input antennas are approved for use with the C406-2 Series ELT. Selection of the proper antenna is dependent upon end use, aircraft configuration and speed, and other factors. See "Figure 6. Antennas".

  • Page 31: Operation

    Figure 7. ELT Operational Flow Diagram A primary feature of the C406-2 Series ELT is its simplicity of operation. As long as the ELT is connected to the remote switch harness ELT connector, such that pins 5 and 8 are jumpered (G-switch loop), it will activate in the event of a crash.

  • Page 32: Normal Operation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) It is possible the primary G-switch or one of the auxiliary G-switches could activate the ELT in either a fixed or rotor wing aircraft as the result of severe maneuvers or a very hard landing.

  • Page 33: Specifications

    TASK 25-62-11-870-803 3. Specifications SUBTASK 25-62-11-870-001 Environmental and Physical Table 2 lists the environmental and physical specifications of the C406-2 Series ELT. NOTE: For automatic activation, the higher threshold of 4.5 ft/sec (2.3 ) is specified in accordance with Eurocae ED-62. Use of the higher threshold crash sensor has been approved by the FAA as a deviation to TSO C126 (FAA Reference #98-130S-108, February 6, 1998).

  • Page 34: Electrical

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-870-002 Electrical Table 3 lists the electrical specifications of the C406-2 Series ELT. Table 3. Electrical Specifications CRITERIA PARAMETER CHARACTERISTIC ± 2 KHz (Initial) 406.025 MHz ± 5 KHz (5 years)

  • Page 35: Antennas

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-870-003 Antennas Table 4 lists the specifications of the antennas approved for use with the C406-2 Series ELT. Table 4. Antenna Specifications CHARACTERISTIC PARAMETERS 110-320 110-328-01 110-333...
  • Page 36 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) THIS IS A BLANK PAGE 25-62-11 Page 36 of 90 APR 06/10...

  • Page 37: Test And Fault Isolation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TEST AND FAULT ISOLATION TASK 25-62-11-750-801 1. Inspection and Test Regulatory Requirements SUBTASK 25-62-11-990-001 United States 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: Proper installation;...

  • Page 38: Other Countries

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-990-003 Other Countries 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.

  • Page 39: Inspection And Test Procedures

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-750-802 2. Inspection and Test Procedures SUBTASK 25-62-11-990-001 Checklist 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.

  • Page 40: Preparation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-000-001 Preparation Remove the ELT in accordance with SUBTASK 25-62-11-010-001, on page 51. Remove the battery pack in accordance with SUBTASK 25-62-11-050-001, on page 52. SUBTASK 25-62-11-220-001 Coax Cables and Wiring Connections Inspection –...

  • Page 41: G-Switch Functional Check - Item 4

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) When the total of all known transmissions exceeds one hour; or On or before battery replacement (expiration) date. SUBTASK 25-62-11-750-001 G-Switch Functional Check – Item 4 CAUTION: A JUMPER IS REQUIRED TO PERFORM THIS CHECK. DUE TO THE POTENTIAL OF PHYSICAL DAMAGE IF THE JUMPER IS IMPROPERLY INSTALLED, THIS STEP SHOULD ONLY BE PERFORMED BY AN EXPERIENCED TECHNICIAN/MECHANIC.

  • Page 42: 121.5 Mhz Frequency Measurement - Item 5A

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Place the ELT in a container or screen room capable of substantially attenuating RF signals, or the transmitter power output shall be connected to a suitable dummy load to minimize radiation.

  • Page 43: 121.5/243.0 Mhz Power Output Measurement - Item 5C

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-750-005 121.5/243.0 MHz Power Output Measurement – Item 5c Connect the measuring device, referring to SUBTASK 25-62-11-750-002, on page 41. Activate the ELT, if necessary, by placing the control switch in the “ON” position.

  • Page 44: Current Draw Test - Item 5F

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-750-008 M. Current Draw Test – Item 5f CAUTION: EXERCISE EXTREME CAUTION TO AVOID CAUSING A SHORT CIRCUIT CONDITION, WHICH WILL BLOW THE FUSES IN THE BATTERY PACK. THIS TEST SHOULD ONLY BE PERFORMED BY AN EXPERIENCED TECHNICIAN/MECHANIC.

  • Page 45: Digital Message Verification - Item 5G

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Allow the ELT to stabilize for at least 30 seconds to avoid false readings. Read the current draw on the ammeter. Steady state current draw must not exceed 200 mA.

  • Page 46: Elt Reset Check - Item 5H

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Repeat the activation and deactivation cycle if the ETS fails to read the message on the initial try. The 406 MHz oscillator may not be warmed up. If continued attempts to read the message fail, check for self-test error codes and refer to Table 6, on page 48.

  • Page 47: Antenna Test - Item 7

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-750-012 Antenna Test – Item 7 CAUTION: DO NOT ALLOW THE DURATION OF THIS TEST TO EXCEED 5 SECONDS. Tune a low quality AM receiver (i.e., radio) to 121.5 MHz.

  • Page 48: Fault Isolation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-810-801 3. Fault Isolation SUBTASK 25-62-11-810-001 Self-Test Error Troubleshooting Guidelines Table 6 describes the ELT self-test LED error codes (i.e., flash codes), their probable causes, and possible solutions. The 5-flash error is not present when the ELT is programmed with a serial user protocol (short message).
  • Page 49 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) CODE PROBABLE CAUSE POSSIBLE SOLUTION Battery low Low power output 3A fuse on battery pack circuit board faulty 3-Flash (cont.) Improper programming Verify 406 MHz programming Cannot be repaired in field - Return to...

  • Page 50: Elt Troubleshooting Guidelines

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-810-002 ELT Troubleshooting Guidelines Table 7 provides ELT troubleshooting guidelines for installation and operational issues. Table 7. ELT Troubleshooting Guide SYMPTOM PROBABLE CAUSE POSSIBLE SOLUTION Improper wiring...

  • Page 51: Removal

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) REMOVAL TASK 25-62-11-010-801 1. ELT SUBTASK 25-62-11-010-001 ELT Removal See "Figure 11. ELT Removal Sequence". PROTECTIVE TOP COVER ASSY MOUNTING FRAME ELT MAIN CAP ASSY ASSY NOTE: Coax cables and wiring harness not shown for clarity.

  • Page 52: Battery

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-050-801 2. Battery SUBTASK 25-62-11-050-001 Battery Pack Removal CAUTION: THE BATTERY PACK CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE (ESD) COMPONENTS AND IT MUST BE HANDLED WITH CARE. IF POSSIBLE, WEAR A GROUNDED WRIST STRAP WHEN HANDLING THE BATTERY PACK DURING INSTALLATION ACTIVITIES.

  • Page 53: Material Or Equipment Return

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-500-801 3. Material or Equipment Return SUBTASK 25-62-11-510-001 Shipment Information If any material or equipment is to be returned to the factory, under warranty or otherwise, Wulfsberg Electronics must be notified prior to shipment with the following information: •...
  • Page 54 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) THIS IS A BLANK PAGE 25-62-11 Page 54 of 90 APR 06/10...

  • Page 55: Regulatory Requirements And Guidelines

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) INSTALLATION TASK 25-62-11-410-801 1. Regulatory Requirements and Guidelines SUBTASK 25-62-11-990-001 TSO C126, Paragraph D 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.

  • Page 56: Rtca

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-990-005 RTCA DO-204, § 3.1.8 guidelines for mounting a ELT: The ELT shall be mounted to primary aircraft load carrying structures, such as trusses, bulkheads, longerons, spars, or floor beams.

  • Page 57: Mounting Tray

    STRUCTURAL INTEGRITY OF THESE COMPONENTS. THESE SAME CHEMICAL AGENTS MAY ALSO CAUSE CORROSION OF ELECTRICAL CONNECTIONS. Select a suitable location for the ELT mounting tray. See "Figure 13. C406-2 Series ELT Outline and Dimensions". Refer to these dimensions when determining mounting location.

  • Page 58: Installation

    Refer to TASK 25-62-11-410-803, on page 78, for guidelines on ELT orientation in a helicopter. Mark the four holes needed for mounting the tray, using the tray as a pattern. The hole pattern is also illustrated in "Figure 13. C406-2 Series ELT Outline and Dimensions”, on page 57. 25-62-11...
  • Page 59 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Drill the four mounting holes with a #19 or 4.25 mm drill. Install the mounting tray with the 8-32 x 5/8” SS pan head phillips screws, flat washers, lock washers, and nuts provided in the installation kit (455-7421), as shown in "Figure 14.

  • Page 60: Antenna

    SUBTASK 25-62-11-990-001 Selection Use only antennas approved for use with the C406-2 Series ELT. The ELT will not work properly without being connected to an antenna for which it was designed. Verify the antenna selected matches the requirements of the specific installation.

  • Page 61: Figure 15. Rod Antenna 110-320 And Blade Antenna 110-328-01 Outlines And Dimensions

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) 13.00 INSTALLATION NOTES: (330) 1. MOUNT ANTENNA USING #8-32 SS 100° C’SK MACHINE SCREWS AND ASSOCIATED HARDWARE. 72548( 72  “ /%,1  “ 1‡FP 2. PROVIDE 0.625 (5/8”) (16 MM) Ø HOLE BNC CONNECTOR AND 0.703 (45/64”)

  • Page 62: Figure 16. Blade Antennas 110-333 And 110-337 Outlines And Dimensions

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) INSTALLATION NOTES: 1. MOUNT ANTENNA USING #10-32 SS MACHINE SCREWS AND ASSOCIATED HARDWARE 72548( 72  “ /%,1  “ 1‡FP  2. PROVIDE 0.625 (5/8”) (16 MM) Ø HOLE FOR BNC CONNECTOR AND 0.703 (45/64”) (17.9 MM)

  • Page 63: Remote Switch

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-450-803 4. Remote Switch SUBTASK 25-62-11-450-001 Location NOTE: This procedure is applicable to the most commonly used remote switch (345-6196-04). If an optional switch is installed in lieu of this one, the applicable installation instructions should be consulted.

  • Page 64: Buzzer

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-450-804 5. Buzzer SUBTASK 25-62-11-450-001 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.

  • Page 65: Wiring

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-450-805 6. Wiring SUBTASK 25-62-11-990-001 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.

  • Page 66: Remote Switch Harness Fabrication

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-450-001 Remote Switch Harness Fabrication See "Figure 19. Remote Switch Harness Arrangement". MOUNTING FRAME TOP COVER (REF.) 151-5012 PIN 12 USE MALE CRIMP PINS (151-6627) PIN 10...

  • Page 67: Figure 20. Remote Switch Harness Wiring Diagram

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Fabricate ground wire long enough to reach from Pin 9 of the remote switch plug to aircraft ground. Fabricate a power wire long enough to reach from the remote switch plug (Pin 1 or Pin 3) to the selected aircraft power source.

  • Page 68: Elt 12-Pin Receptacle Installation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Crimp an appropriately sized ring terminal on the remote switch power source wire end. NOTE: If desired, the power wire may be spliced to a power source in a manner acceptable to the aircraft manufacturer, or as described in AC 43.13-1, Paragraph 11-167.

  • Page 69: Cockpit Remote Switch 9-Pin Plug Installation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Insert the buzzer power and ground wires in Pin 2 (+) and Pin 4 (–) of the receptacle, respectively. 12-PIN MOLEX NOTE: FEED THE WIRE BUNDLE THROUGH THE MOUNTING...

  • Page 70: Wiring Installation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-450-004 Wiring Installation Route the remote switch harness wire bundle and breakout wiring through the airframe. Route the two antenna coax cables through the airframe. NOTE: Longer coax cables, up to 20 feet (6.1 m), may be fabricated if the cables provided are too short.

  • Page 71: Airframe Ground Connections

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-450-008 Airframe Ground Connections Connect the ground wires to the airframe in accordance with the aircraft manufacturer’s written instructions or as described in AC 43.13-1, Chapter 11, § 15, as applicable. See "Figure 20.

  • Page 72: Elt Installation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-410-802 7. ELT Installation SUBTASK 25-62-11-410-001 Installation and Test See "Figure 22. ELT Installation Sequence". PROTECTIVE TOP COVER ASSY MOUNTING FRAME CAP ASSY ELT MAIN ASSY NOTE: Coax cables and wiring harness not shown for clarity.

  • Page 73: Harness Elt Receptacle Sealing

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) (11) Secure the mounting frame cap to the mounting tray with the thumbscrews and tighten them to no more than 18 lb-in (203 N•cm). (12) Tie up excess slack in the harness and coax cables, such that they form drip loops and there is enough slack, approximately 5 in.

  • Page 74: Installation Documentation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-410-002 Installation Documentation Make appropriate logbook (i.e., aircraft records) entries and submit FAA Form 337, along with any supporting data required by the FAA for approval of the installation, as applicable.

  • Page 75: Battery Pack Installation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-450-806 8. Battery Pack Installation SUBTASK 25-62-11-450-001 Battery Reinstallation CAUTION: THE BATTERY PACK CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE (ESD) COMPONENTS AND IT MUST BE HANDLED WITH CARE. IF POSSIBLE, WEAR A GROUNDED WRIST STRAP WHEN HANDLING THE BATTERY PACK DURING INSTALLATION ACTIVITIES.

  • Page 76: Figure 24. Battery Pack Retaining Screw Tightening Pattern

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Reset the ELT by toggling the ELT local control switch to “ON” and back to “OFF” after 1-2 seconds. NOTE: This step is necessary because the ELT will occasionally activate when power is connected to it in Step 6.

  • Page 77: New Battery Installation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-450-002 New Battery Installation CAUTION: DO NOT USE CONTACT CLEANER ON ELT COMPONENTS. SUCH CHEMICAL AGENTS CAN BE HIGHLY DESTRUCTIVE TO THE MOUNTING HARDWARE AND ELT HOUSING, CAUSING CRACKING, FRACTURING AND OTHER DAMAGE.

  • Page 78: Helicopter Installations - Special Considerations

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-410-803 9. Helicopter Installations - Special Considerations SUBTASK 25-62-11-990-001 Background There are few guidelines, aside from experience, regarding the best way to mount an ELT in helicopters.

  • Page 79: Orientation

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) SUBTASK 25-62-11-410-001 Orientation Mount the C406-2HM ELT parallel to the waterline of the fuselage, along the longitudinal axis, with the direction-of-flight arrow on the ELT pointing forward. See "Figure 26. Orientation of ELT for Helicopter Installations".
  • Page 80 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) THIS IS A BLANK PAGE 25-62-11 Page 80 of 90 APR 06/10...

  • Page 81: Appendix A - Elt Registration

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) APPENDIX A – ELT REGISTRATION TASK 25-62-11-990-801 1. Background Information SUBTASK 25-62-11-990-001 Hex ID Code Each 406 MHz ELT is programmed with a unique hex ID code (i.e., registration code) that is transmitted to the SAR satellite system.

  • Page 82: Registration

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-990-802 2. Registration SUBTASK 25-62-11-990-001 Responsibility It is the responsibility of the aircraft owner to register the ELT. 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-registered.

  • Page 83: Illustrated Parts List

    Purpose This illustrated parts list (IPL) illustrates and lists the spare parts, with attaching hardware, applicable to the C406-2 Series ELT. 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.

  • Page 84: Manufacturer Name And Address

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-990-802 2. Manufacturer Name and Address SUBTASK 25-62-11-990-001 Ordering Information Approved parts may be ordered from Wulfsberg Electronics, or any authorized dealer. CONTACT INFORMATION Sales, Wulfsberg Electronics 6400 Wilkinson Dr.

  • Page 85: Explanation Of Detailed Parts List Entries

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-990-803 3. Explanation of Detailed Parts List Entries SUBTASK 25-62-11-990-001 Fig # & Item Column The first number at the top of the column is the figure number of the corresponding illustration.

  • Page 86: Upa (Units Per Assembly) Column

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Assemblies, subassemblies, and detail parts subject to modification, deletion, addition, or replacement by an issued service bulletin, are annotated to indicate both pre- and post- service bulletin configurations. The term (PRE SB XXXX) in the “Nomenclature” column designates the original configuration, and the term (POST SB XXXX) identifies assemblies and parts after the modification has been completed.

  • Page 87: Detailed Parts List

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) TASK 25-62-11-990-804 4. Detailed Parts List Figure 27. C406-2 Series ELT Main Assembly and Installation FIG # ITEM PART # 1234 NOMENCLATURE 452-3052 Protective Top Cover Assembly 452-5052...
  • Page 88 COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) FIG # ITEM PART # 1234 NOMENCLATURE – 591-0999 . Label, Hex Code – 591-0429 . Label, Country Code 452-0133 . 406 Lithium Battery Pack ATTACHING PARTS –...

  • Page 89: Figure 28. Electrical Components

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Figure 28. Electrical Components WIRING HARNESS (Ref. Only) FIG # ITEM PART # 1234 NOMENCLATURE 345-6196-04 Switch, Cockpit Remote ATTACHING PARTS – 201-0408 Screw, PHP 4-40 x 1/4” SS –...

  • Page 90: Figure 29. Antennas

    COBHAM AVIONICS WULFSBERG ELECTRONICS ABBREVIATED COMPONENT MAINTENANCE MANUAL C406-2 (453-5000), C406-2HM (453-5001) Figure 29. Antennas FIG # ITEM PART # 1234 NOMENCLATURE 110-337 Antenna, 406 Blade (319 Dual Input) 110-328-01 Antenna, 406 Blade (Dual Input) 110-333 Antenna, Tri-Band Blade, White (Dual Input)

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