UG-GA182/GA212-01
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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
4. Check if ICS can hot-mic by turning the ICS volume knob fully clockwise. If ICS can hot-mic
but not be keyed by the keyline, check continuity between ICS PTT keyline and ground. The
keyline should be open-circuit when unkeyed, and grounded when keyed.
5. If the ICS cannot be keyed by hot-mic VOX or keyline, then the router might not configured
for ICS on that channel. Contact Eagle Technical Support for further on-aircraft tests before
returning the router for servicing.
5.4.3. Cannot Receive on ICS
1. Set the controls as described in Section 4.4.1.
2. First confirm the ICS is transmitting correctly at the station keying their ICS.
3. If receiving other audio except ICS is possible, then the router is possibly not configured for
ICS on that channel. Contact Eagle Technical Support for further on-aircraft tests before
returning the router for servicing.
6. Radio Issues
Radios include VHF COM radios, mission radios, Navigation receivers, cellphones and
satphones, PA controllers and other devices that are connected to a radio port on the router for
either transmit, receive or two way audio communication.
6.1. No Radio Receive at Headset
1. Confirm audio sources that are expected to be received are switched on and the volume level
of the devices themselves has been set to midpoint.
2. For radios, confirm that they are tuned to a channel that is receiving audio (e.g. ATIS or a
weather advisory channel). If the device has a ‘receiving’ indicator, confirm that it is active as
expected.
3. Confirm devices are selected for receive on the Eagle control panels:
a. Confirm system is not in Emergency Mode.
b. Either the grey receive knob is OUT or the device is selected through a rectangular
button.
c. That the volume control for the receiving device (if present), and Master Volume are
at midpoint.
d. Confirm no other audio devices are selected for transmit or receive. Some audio
inputs (such as aux audio jacks) may be set to mute when audio is received on a
higher priority input, or when transmitting.
4. Confirm continuity of receive wiring between radio and router unit. Check connectors at both
ends and any disconnects for damage, corrosion, or pins pushed back.
5. If possible confirm audio is present at the router connector using an oscilloscope or a headset
and a pair of probe wires.
6. If all the above is correct, the fault is likely in the router. Return to Eagle Copters for servicing.
6.2. Unable To Transmit
6.2.1. Troubleshooting Procedure
1. Confirm crew headset is working by communicating on ICS inside the aircraft. This will check
microphone and earphone operation
2. Confirm radio is switched on and tuned to an appropriate frequency
3. Confirm receive audio can be heard. If not troubleshoot “No Radio Receive at Headset”
4. Select the radio on the control panel and confirm the indicator above the TX select button
illuminates
5. Key the radio for transmit and confirm the TX light to the left of the ICS/TX toggle switch
illuminates
a. If the light does not illuminate, investigate disconnected Transmit PTT Keyline
6. Confirm the TX indicator on the radio signals that it was keyed
Summary of Contents for P139-HD
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