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Cannot hear communication from Air Traffic Control tower | Bose A20 Aviation Headset
Determine if any recent changes have been made to the headset or aircraft.
If any changes or modifications have been made to either the headset or the aircraft, look into whether or not those changes could have unexpectedly caused this issue.
Connect the headset to a different panel jack or, if possible, to another aircraft.
Non-TSO equipment, worn jacks/loose connections, or incorrectly wired jacks (i.e. reversed stereo or mic / ground wires) in the aircraft can cause issues. If available, try connecting the headset to another jack in the aircraft or to jacks in a separate aircraft. If the headset works fine when connected elsewhere, the panel jack or wiring to the jack is the issue.
Check the AUDIO switch on the control module.
- Remove the batteries from the control module
- Determine the position of the AUDIO switch
- Set to Mono (right) by default. For use with mono intercoms and U174 connections. Routes single channel audio to both ears
- Set to ST (left) if the aircraft has a stereo intercom
- If necessary, change the position of the switch using a push-pin or paperclip
- Reinstall the batteries. Match the polarity on the batteries to the markings inside the battery compartment
Plug in a different headset.
If available, connect a different headset to the aircraft to determine if the issue is related to the aircraft panel or its settings.
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