INSTRUMENTS (AND AVIONICS) / ELT 13-47
CHANGE C2 ICON A5 / MAINTENANCE MANUAL
RELATED INFORMATION:
"ELT Access" on page 13-42
"ELT Battery Self Test" on page 13-47
13.5.3.3 ELT Battery Self Test
The ELT is capable of performing a self test to verify that major ELT systems are functioning properly.
TASK INFORMATION:
Type of Maintenance
Line
Level of Certification
Owner/Pilot
Task Specific Training Required
No
Special Tools Required
None
Parts Required
None
Aircraft System and Number
10—Instruments (and Avionics)
Consumables
None
During the self test, the ELT transmits on 121.5 MHz for 1 second, (3 audio sweeps) then transmits a
406 MHz test burst for 550ms, then returns to the armed mode.
There are two modes in which a self test can be initiated:
1) When the ELT is in the “Armed” position, pressing the “Reset/Test” switch on the cockpit
remote control (RCPI) initiates a self test.
2) When the main switch of the ELT is moved from the “Off” position to the “Armed” position, it
does a self test. This mode is primarily designed to provide a method to bench test the ELT,
with the remote control disconnected.
1. Connect an aircraft headset to the headset jacks so that radio transmissions can be heard.
2. Turn on the aircraft master switch (the ELT receives no power from the aircraft).
3. Tune the aircraft radio to 121.5 MHz, and turn the squelch all the way off to listen for the modu-
lated carrier.
4. With the ELT main switch in the “Armed” position, and not operating, press the “Reset/Test”
button on the cockpit remote control (RCPI) once. You will hear one second of 121.5 audio on the
radio, followed by either one beep from the audio alert indicator, or one beep followed by a two
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