UG-GA182/GA212-01
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COPYRIGHT
2021 BY EAGLE COPTERS USA INC.
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THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED
OR COMMUNICATED TO ANY OTHER PERSON WITHOUT WRITTEN PERMISSION FROM EAGLE COPTERS USA INC.
Revision:
A
1. INTRODUCTION
1.1. Purpose
This document describes troubleshooting steps that can be performed at the aircraft for
determining the causes of faults on or surrounding the P139-HD Digital Audio System.
1.2. Description
The P139-HD is capable of connecting to almost any audio source or destination that may be
installed in an aircraft, including aircraft radios, crew headsets and mission equipment.
The router also connects to the audio control panels that control the system via a proprietary
interconnect protocol named Gnet.
Pilot and copilot control panels also control the system’s Emergency Mode, which permits direct
connection of flight crew to COM radios and warning tones in event of power or system failure.
Should an issue occur there are troubleshooting steps that can be performed at the aircraft to
narrow down the issue to a particular component of the system.
1.3. Scope
This document is designed to assist troubleshooting to the Line Replaceable Unit (LRU) level. It
does not provide troubleshooting information for the internal components of the Audio Router or
Control Panels. There are no user serviceable parts inside the LRUs and they should never be
opened, but should be returned to Eagle Copters for repair.
This document assumes the technician is familiar with Eagle Audio wiring drawings
(G13004/G13162) and has access to the as-built drawings of the aircraft. Some troubleshooting
steps may be performed without knowledge of the aircraft wiring.
1.4. Definitions
Configuration Mode ... System is serving the Configuration Web Page to allow settings changes.
System runs slower than Flight Mode, and MMC card is required to serve
the web page
Emergency Mode ...... Direct connection of Pilot Headset to COM1 and Warnings, and Copilot
Headset to COM2 and Warnings, for use when power fails or other issues
occur
Flight Mode ................ System is operating for flight, using internal configuration storage. MMC
card not required in this mode
Gnet ........................... Eagle Proprietary interconnect for control panels and other devices
Normal Mode ............. Pilot and Copilot headsets are connected to the main router electronics
and controllable through their respective control panels
1.5. Abbreviations
COM ........ Communication Radio
ICS ........... Intercom System
LRU ......... Line Replaceable Unit
MMC ........ MultiMedia Card
PTT .......... Push To Talk
Содержание P139-HD
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