MAINTENANCE MANUAL
AQUILA AT01
Aviation by Excellence AG
(2) Fail Safe Operation
(a) Turn the unit off by rotating the pilot intercom knob (2) counter clockwise.
(b) Check the failsafe operation by exercising the COM 1 microphone, microphone key and
audio over the headphones.
(c)
Turn the unit back on to continue testing.
(3) Transceiver
(a) Perform a ramp test radio check by exercising the installed transceivers, microphone,
microphone key and audio over the headphones and speaker. Verify that
communications are loud and clear and PTT operation is correct.
(4) ICS
(a) Set the intercom to the ALL mode [Crew (6) and Pilot (7) LED's off.]
(b) Plug in headsets at pilot and co-pilot ICS position.
(c)
Adjust squelch (9) and volume (8) for each position and verify that the ICS is working
properly.
(d) Check ICS positions for isolation and proper operation of volume and squelch controls
(1, 2, 8 and 9).
(e) Press the PA button (5). Verify that microphone audio is heard over the speaker.
(5) Aircraft Receivers
(a) Select the audio source corresponding to each installed avionics unit and check for audio
over the headsets.
(b) Check for pilot/copilot audio isolation when pressing the COM 1/2 button (3).
(c)
Press the SPKR button (4) and verify that any selected audio is heard over the speaker.
4.
A.
The following adjustments can be made through access holes in the top cover of the GMA 340:
(1) Marker beacon audio level (optional).
(2) Marker beacon sensitivity (optional).
(3) Aircraft radio speaker output level
(4) Pilot PA microphone speaker output level
(5) Copilot PA microphone speaker output level
(5) MUSIC 1 mute trip level
Refer to Garmin GMA 340 Audio Panel Installation Manual, P/N 190-00149-01, Rev. K or later for
detailed instructions regarding these adjustments.
Adjustment / Test
23-50-00
Page 203
EFFECTIVITY
Aircraft equipped with Garmin Avionics
Communications
30.04.08
Summary of Contents for ATO1
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