11
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. (Fig. 17)
YOU MUST PERFORM A SELF TEST EVERY THREE MONTHS
to verify the ELT is
functioning properly.
To perform the self test, make sure
THE AIRCRAFT M
ASTE
R SWITCH IS OFF AND THERE
IS NO POWER APPLIED TO THE ELT THROUGH THE GPS INTERFACE.
Tune an aircraft
radio to 121.5 MHz, and turn the squelch all the way off to listen for the modulated carrier.
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 second delay, and a second beep if all systems are functioning properly.
The light will also flash on the remote. (The flashes are random and have no meaning)
System OK codes: One Beep
or
One Beep followed by a second beep two seconds later.
A series of 2 – 5 fast beeps, a 2 second delay, and the beep series repeating again
indicates there is a self test function that has returned a trouble condition. The ELT will not
be disabled, but it should be inspected by a qualified avionics facility as soon as possible.
The trouble code returns a series of beeps with a two second delay, and then the trouble
code is repeated one more time. The first beeps alert you that there is a trouble condition.
The two second delay is to allow you to be ready to count the second set of beeps.
Trouble code sequence: 2-5 beeps — two second delay — 2-5 beeps
TROUBLE CODES:
2 BEEPS
→
BATTERY LOW
3 BEEPS
→
LOW RF POWER
4 BEEPS
→
FREQUENCY NOT LOCKED
5 BEEPS
→
HIGH VSWR OR HIGH CURRENT
SECTION 10 PERIODIC MAINTENANCE/CONTINUING AIRWORTHINESS
THE FOLLOWING TEST MUST BE PERFORMED EVERY THREE CALENDAR MONTHS.
ELT SELF TEST FUNCTION AS DESCRIBED IN SECTION 9 OF THIS MANUAL.
THE FOLLOWING TESTS MUST BE PERFORMED A MINIMUM OF EVERY TWELVE
CALENDAR MONTHS, TO ASSURE THE CONTINUING AIRWORTHINESS OF THE ELT.
1.) Inspect the ELT transmitter and mounting tray to insure all fasteners, and mechanical
assemblies are secure.
2.) Inspect the coaxial cable connecting the ELT transmitter to the antenna for cuts or
abrasions on its outer jacket. Disconnect the BNC connector at each end. Examine both
BNC connectors and the mating plug on the ELT transmitter, and antenna base for any
signs of corrosion.
3.) Inspect the modular cable connecting the ELT to the RCPI unit for signs of wear or
abrasion on it’s outer jacket. Remove the modular plug connecting the ELT transmitter
