ED Decision 2007/015/R
The Engine control devices, systems and instruments referred to in CS-E 50(e) are usually provided in modern engines by over-speed protection and/or circuits which although they may be provided as independent devices are generally provided as part of the electronic Engine Control System. One acceptable method for showing compliance with the specification for "reasonable assurance" of providing functionality of the protection systems or circuits is to have them periodically tested by built-in test equipment (BITE) or a functional test.
In case of the over-speed protection system, the BITE test should provide complete test of the electrical/electronic part of the protection system. The need for inspections or tests of the mechanical or actuating part of the protection system should be based on the results of the safety analysis for this part.
[Amdt. No.: E/1]
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