AD Amdt-39-10757
Unsafe Condition
Vibration caused by loose parts in the powerplant mount and propeller mount could lead to engine damage and loss of engine power during critical flight phases.
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Required Actions
Inspect the powerplant mount and propeller mount for loose parts. Modify the starter motor, retrofit the starter motor holder, and check engine ignition timing either immediately or based on inspection results.
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Compliance Time
Immediately or at a certain time depending on inspection results.
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Affected Aircraft
Glaser-Dirks Flugzeugbau GmbH Model DG-400 gliders subject to mandatory continuing airworthiness information (MCAI) from Germany.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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