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AD/ENG/4 Amdt 11 - Piston Engine Continuing Airworthiness Requirements
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AD/ENG/4 Amdt 11 - Piston Engine Continuing Airworthiness Requirements
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Requirement A2 - At the intervals not exceeding 100 hours with a planning tolerance of plus or minus 10 hours.
Requirement A3(a) - At intervals as published by the engine manufacturer with a planning tolerance of plus or minus 10%.