Description, Operation And Testing Of Pilot's Remote Switch - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
a. Remove the access panel or cover to gain access to the transmitter.
b. Turn the aircraft master switch ON.
c.
Tune the aircraft communications receiver volume up until a slight background noise is heard.
NOTE
If the aircraft is not fitted with a communications receiver, request
that the tower listen for your test.
d. On the transmitter, set the ON/ARM/OFF switch to the ON position. Keep the switch in this
position for only a few seconds: then set to the OFF position or ARM if there is no OFF. Return to the
ARM position.
NOTE
The test transmission should have been picked up by the aircraft
communications receiver and/or control tower. During cold
weather, there may be a slight delay before transmission occurs.
e. A transmitter which is functioning properly should emit a characteristic downward swept tone.
f. When the test is completed, ascertain the transmitter ON/ARM/OFF switch is in the ARM
position.
WARNING
Whenever the unit is checked by moving the transmitter
ON/ARM/OFF switch from the ARM to the ON position, it must
then be moved to the OFF position, if there is one, before
reverting to the ARM position again.
CAUTION
Under normal conditions, the transmitter switch must be set to
arm.
g. Replace the access panel and secure with the appropriate screws.
NOTE
Inspect the external whip antenna for any damage. Avoid bending
the whip. Any sharply bent or kinked whip should be replaced.
Antenna damage may cause structural failure of whip in flight.
12-9. DESCRIPTION. OPERATION AND TESTING OF PILOTS REMOTE SWITCH. (Referto Pilot's
Operating Handbook.)
Reissued: 9/23/80
ELECTRONICS
4A16