AD 2004-18-12
Unsafe Condition
Warner LA10 spindle drive failure, which could result in failure of the engine pylon extension/retraction mechanism, causing an unstable engine pylon assembly during flight with loss of control of the sailplane.
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Required Actions
Replace the Warner LA10 spindle drive with the Stross BSA 10 spindle drive and make necessary electrical modifications, including installing a voltage converter for the spindle drive brake, following DG Flugzeugbau GmbH Technical Note No. 843/18, issue 2, dated June 25, 2003.
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Compliance Time
Within 25 hours time-in-service after October 22, 2004.
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Affected Aircraft
DG Flugzeugbau GmbH Model DG-500MB sailplanes, all serial numbers up to and including 5E220B15.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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