Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual page 524

PIPER CHEROKEE WARRIOR SERVICE MANUAL
12-12. TESTING NARCO 10 EMERGENCY LOCATOR TRANSMITTERS
Conduct ELT tests in a screen room or metal enclosure to ensure that electromagnetic energy is not
radiated during testing. If a shielded enclosure is not available, perform tests in accordance with the following
procedures:
Consult FAA Advisory Circular AC 20-81 for detailed testing
information and precautions
a. Conduct test only during the first five minutes after any hour.
b. If operational test must be made at any time other than the first five minutes after the hour, notify
the nearest FAA traffic Control Tower or Flight Service Station prior to the test.
c. Test should be no longer than three audio sweeps.
d. If the antenna is removed, a dummy load should be substituted during the test.
1. Remove the access panel or cover to gain access to the transmitter.
2. Turn the aircraft master switch ON.
3. Tune the aircraft communications receiver to 121.5 mHz and turn the volume up until a slight
background noise is heard.
If the aircraft is not fitted with a communications receiver,
request that the nearest FAA facility listen for the ELT signal.
4. Set the ON/ARM/OFF switch on the transmitter to the ON position. Keep the switch in this
position for only a few seconds; then set to the OFF position. Return to the ARM position.
5. If transmitter is only labeled ON/ARM, set to ON position for a few seconds, then return to
ARM position
The test transmission should be received by the aircraft
c o mmunications receiver and/or control tower or FAA Flight
Service Station. During cold weather, there may be a slight
delay before transmission occurs.
6. A properly functioning transmitter emits a characteristic downward swept tone.
7. When test is completed, ensure transmitter ON/ARM/OFF, or ON/ARM, switch is in the ARM
position.
Whenever unit is checked by moving transmitter
ON/ARM/OFF switch from the ARM to ON position, it must
first be moved to the OFF position before resetting to ARM
position.
e. Install access panel at aft fuselage station 228.30 and secure with the appropriate screws.
Added: February 28, 1995
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2J21
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