6. Post Installation Testing
It is important to note that as of December 2009, the FAA has not given any clear guidelines to
testing the 406 portion of the C126a TSO’d units. They have left it up to the manufacturers to
set up what tests they require.
During the INITIAL tests Emerging Lifesaving Technologies strongly suggests that a complete
and comprehensive test be done using a WST or equivalent. Test should include but not be
limited to:
• Power Output
• Frequency Stability
• GPS Information for Accuracy
• Hex Coding
• Country Coding
6.1 Self-Test
There are two separate and distinct self tests. The first is a Systems Self-Test and the second is a
GPS Self Test. Using the remote, the pilot can initiate either test. This test can be done at the
remote or the unit itself. They are both equipped with an ON, ARM, TEST/RESET switch, a tri-
color (red/yellow/green) LED, and an aural alert. These self tests will indicate go/no go status.
Caution: THESE TESTS SHOULD ONLY BE DONE ON THE GROUND.
* The system has been designed to restrict continuous self testing. Once a self test has been
activated the microprocessor restricts any further activation until the appropriate wait time of one
minute has been achieved.
Caution: The life of the battery has been computed to give maximum activation time in
case of an emergency. No more than one self test of the system and GPS should be
accomplished per month. Excessive testing will reduce the transmission time in the event
of an accident.
Systems Self Test
Color Flashes Disposition
Yellow 5 ELT Test Good
GPS Default Data encoded
Red 4 Battery Odometer less than 36 hours
Red 3 Transmitter Chain Failure
Red 2 Antenna Fault
1 No external power applied
2 Press the Test button twice for one second each and release
3 The switch will return to the ARM position.
4 A green light will illuminate for 10 seconds
5 Light will go out for three seconds.
6 Note the fault legend for systems status
(Fig. 16)
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