PS Engineering PMA4000 Installation Manual - Manual (Page 12)

PS Engineering
PMA4000 Series Audio Selector Panel and Intercom System
Installation Manual
200-041-0002 Page 2-6 Rev 5, March 2007
2.7.1 Operational Checkout
1. Apply power to the aircraft and avionics.
2. Plug headsets into the pilot, copilot and passenger positions.
3. Place the Mic Selector Switch to the Com 1 position.
4. Verify that the C1 light comes on. If the push-button is flashing, stop testing and trou-
bleshoot the microphone PTT installation. A flashing indicator in the COM select
button indicates that the key line is grounded.
5. Verify proper transmit and receive operation on the pilot and copilot positions, noting
that the PTT switches allows proper transmission on the selected transceiver.
6. Verify that the button blinks when the selected transmitter is active.
7. Verify that switching to the C2 position causes the button to illuminate and the Com
2 receiver to be heard. Verify transmit and receive on Com 2.
8. Press the Com 1 push button, and verify that Com 1 and Com 2 receive audio can be
heard.
9. Verify proper operation of the Nav 1 and Nav 2 receiver sources by selecting them
using the N1 and N2 buttons. Note that the button for the receiver sources stays in,
and the button illuminates to show which source is in use.
10. Push in volume control to activate the speaker (SPR) switch. Verify that all selected
audio is heard in the cockpit speaker. Verify that the audio mutes when the mic is
keyed.
11. Verify proper Intercom system operation in the A LL , and I SO modes.
12. Verify that the audio selector panel system does not adversely affect any other air-
craft system by systematically switching the unit on and off, while monitoring the
other avionics and electrical equipment on the aircraft.
2.8 Final Inspection.
Verify that the wiring is bundled away from all controls and no part of the installation
interferes with aircraft control operation. Move all controls through their full range while
examining the installation to see that no mechanical interference exists. Verify that the
cables are secured to the aircraft structure in accordance with good practices, with ade-
quate strain relief. Ensure that there are no kinks or sharp bends in the cables. Verify that
the cables are not exposed to any sharp edges or rough surfaces, and that all contact
points are protected from abrasion. Complete log book entry, FAA Form 337, weight and
balance computation and other documentation as required. Return completed warranty
registration application to PS Engineering.