Northern Airborne Technology AA83-001 rev.4.10 - Manual (Page 18)

SM09-2 Rev. 4.10 AA83-001 InterMUSIC™ Stereo Intercom System Manual
2.3.7.2
Power On checks
Install the AA83-001 and power up the aircraft’s systems, and turn on the radios and
accessories required. Verify normal operation of all functions. Refer to Section 3 for
specific operation details.
a)
Begin with only the pilot's headset installed, no hand mic. Check for correct radio
operation (both receive and transmit) and ICS operation. Check yoke (or cyclic)
switch action.
b)
If there is a music source in the system turn it on and verify that music is heard in
all modes except PLT ISO. Check for proper mute operation.
Note: Unusual buzzes, hums or other background audio may be symptomatic of
multiple grounds or noisy external systems sharing the same wire bundle.
Incorrect jack wiring is a common fault, especially for passenger stations, and
may cause loss of audio, a tone on the headset lines, or other problems.
c) Plug in the copilot's headset. Check for correct radio and ICS operation. Check
pilot's transmit priority. Check yoke or cyclic switch functions, if applicable.
d)
Plug in the hand mic (if applicable to the installation), and test for correct
operation in all modes. It must activate the transmitter(s) in all cases.
e)
Plug in any remaining headsets, and check for correct ICS operation.
f)
To verify proper operation, all functions and levels should be checked in-flight.
Be sure headsets are of good quality and are installed correctly. Unless the AA83-001
has specifically been wired for mono operation NEVER USE MONO AIRCRAFT
HEADSETS in the system, as they will short out one side of the AA83-001 power
amplifier when installed in stereo jacks. This may result in eventual unit failure, which
IS NOT COVERED BY WARRANTY.
2.3.9 Final Check
Fly the aircraft and check levels and operation of all functions. You may wish to change
Bass or Balance controls after flight, depending on how the system performs with
regard to ambient noise.
Upon satisfactory completion of all performance checks, make the required log
entries and complete the necessary Regulatory Agency paperwork before
releasing the aircraft for service.
Page 2-6 Oct 20, 2004
ENG-FORM: 805-0107.DOT
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