ELT ELT406GPS Installation, Operating And Maintenance Manual Download

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8. Special Canadian Maintenance Requirements
NOTE: Canada requires the following checks during the annual inspection. These tests use the
internal battery and should be limited to 12 a year.  The unit has a battery that has an optimal life
of 110 hours of use. These tests, over time, will reduce the life expectancy of the battery.
Emerging Lifesaving Technologies has an internal battery counter that will ensure a minimum of
36 hours of use. During the normal self-test cycle (see section 7.1) if the battery life falls below
minimum standards the light will flash red four (4) times. Replacing the battery is required once
the ”four red  flashes” error occurs.

8.1 Performance Test

To ensure the SAR system is not activated, these tests should be done in such a

manner that no radiated signal escapes. Use of an RF screen room or attenuator

chamber is required. A WST tester or equivalent is required.

All 406 ELTs that are installed in Canadian aircraft require a performance test during the annual
maintenance. A performance test must be done by a ratings certified avionics shop and proper
equipment. The avionics shop will test per CAR Part V, Standard 571, appendix G for the
following:

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An acceptable procedure for operational tests is to activate the self test on the front of the panel
or the remote switch and note any failures of the self-test by RED flashing lights. The self test
looks at eight different functions but will only indicate four during the pilots’ self-test.

See section 6.1 for full details

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