Document Outline

• Record of Revisions
• Service Bulletin List
• List of Effective Pages
• Table of Contents
• List of Figures
• Introduction
  • 1. Manual Usage
    • A. General
    • B. Application
  • 2. Model Description
    • A. B406-4
  • 3. Approvals
    • A. B406-4
    • B. Battery
    • C. RTCA DO-160D Compliance
      • Table 1 Environmental Categories Breakdown
  • 4. Frequency Allocations
    • A. Application
    • B. Discussion
  • 5. List of Acronyms, Abbreviations, and Definitions
  • 6. References
    • A. Regulatory Documents
    • B. Other Documents
• Description and Operation
  • 1. Description
    • A. Functional Overview
    • B. Components
      • Figure 1. B406-4 ELT and Mounting Frame Assembly
      • Figure 2. Remote Switch Panel Assembly Front View
      • Figure 3. Buzzer
      • Figure 4. Battery Pack Assembly
      • Figure 5. Antennas
  • 2. Operation
    • A. Operational Overview
      • Figure 6. ELT Operational Flow Diagram
    • B. Normal Operation
    • C. Manual Activation
    • D. ELT Reset
    • E. Functional Check
  • 3. Specifications
    • A. Environmental and Physical
      • Table 2 Environmental and Physical Specifications
    • B. Electrical
      • Table 3 Electrical Specifications
    • C. Antennas
      • Table 4 Antenna Specifications
• Test and Fault Isolation
  • 1. Inspection and Test Regulatory Requirements
    • A. United States
    • B. Canada
    • C. Other Countries
  • 2. Inspection and Test Procedures
    • A. Checklist
      • Table 5 ELT Inspection and Test Checklist
    • B. Preparation
    • C. Coax Cables and Wiring Connections Inspection – Item 1
    • D. Mounting Tray and Hardware Inspection – Item 2
    • E. Battery Pack Inspection – Item 3
    • F. G-Switch Functional Check – Item 4
    • G. Performance Testing Setup
      • Figure 7. Performance Testing Equipment Setup
    • H. 121.5 MHz Frequency Measurement – Item 5a
    • I. Audio Modulation Check – Item 5b
    • J. 121.5/243.0 MHz Power Output Measurement – Item 5c
    • K. 406 MHz Frequency Measurement – Item 5d
    • L. 406 MHz Power Output Measurement – Item 5e
    • M. Current Draw Test – Item 5f
      • Figure 8. Current Draw Test Setup
    • N. Digital Message Verification – Item 5g
      • Figure 9. Short and Long 406 MHz Message Examples
    • O. ELT Reset Check – Item 5h
    • P. Installed Transmitter Test – Item 6
    • Q. Antenna Test – Item 7
    • R. Inspection and Test Documentation – Item 8
  • 3. Troubleshooting
    • A. Self-Test Error Troubleshooting Guidelines
      • Table 6 ELT Self-Test Error Codes Troubleshooting Guide
    • B. ELT Troubleshooting Guidelines
      • Table 7 ELT Troubleshooting Guide
• Removal
  • 1. ELT
    • A. ELT Removal
      • Figure 10. ELT Removal Sequence
  • 2. Battery
    • A. Battery Pack Removal
      • Figure 11. Battery Pack Removal
  • 3. Material or Equipment Return
    • A. Shipment Information
    • B. Return Material Authorization
• Installation
  • 1. Regulatory Requirements and Guidelines
    • A. TSO C126, Paragraph D
    • B. FAA
    • C. Canada
    • D. Other Countries
    • E. RTCA
  • 2. Mounting Tray
    • A. Location
      • Figure 12. B406-4 ELT Outline and Dimensions
    • B. Installation
      • Figure 13. Typical Mounting Tray Installation
  • 3. Antenna
    • A. Selection
    • B. Location
    • C. Installation
      • Figure 14. Rod Antenna 110-320 and Blade Antenna 110-328-01 Outlines and Dimensions
      • Figure 15. Blade Antennas 110-333 and 110-337 Outlines and Dimensions
      • Figure 16. Blade Antenna 110-337-11 Outline and Dimensions
  • 4. Remote Switch Panel
    • A. Location
      • Figure 17. Remote Switch Panel Assembly Outline and Dimensions
    • B. Installation
  • 5. Buzzer
    • A. Location
    • B. Installation
      • Figure 18. Buzzer Outline and Dimensions
  • 6. Wiring
    • A. General Considerations and Recommendations
    • B. Remote Switch Panel Harness Fabrication and Installation
      • Figure 19. Remote Switch Panel Harness Wiring Diagram
    • C. Buzzer Wiring Fabrication
    • D. ELT 12-Pin Receptacle Wiring Fabrication and Installation
      • Figure 20. Remote Switch Panel Harness Wiring at ELT End
    • E. Coax Cables Installation
    • F. Antenna Connections
    • G. Airframe Ground Connections
    • H. Buzzer Connections
    • I. Remote Switch Panel Final Installation
  • 7. ELT Installation
    • A. Installation and Test
      • Figure 21. ELT Installation Sequence
    • B. Harness ELT Receptacle Sealing
    • C. Installation Documentation
  • 8. Battery Pack Installation
    • A. Battery Reinstallation
      • Figure 22. Battery Pack Installation
      • Figure 23. Battery Pack Retaining Screw Tightening Pattern
    • B. New Battery Installation
• Appendix A – ELT Registration
  • 1. Background Information
    • A. Hex ID Code
    • B. Reason for Registration
    • C. Registration Information Resources
  • 2. Registration
    • A. Responsibility
    • B. Required Information
    • C. Where to Register
• Illustrated Parts List
  • 1. Introduction
    • A. Purpose
    • B. IPL Usage Guide
  • 2. Manufacturer Name and Address
    • A. Ordering Information
  • 3. Explanation of Detailed Parts List Entries
    • A. Fig # & Item Column
    • B. Part # Column
    • C. Nomenclature Column
    • D. UPA (Units Per Assembly) Column
  • 4. Detailed Parts List
    • Figure 24. B406-4 ELT Main Assembly and Installation
    • Figure 25. Electrical Components
    • Figure 26. Antennas