AD 2003-20-09
Unsafe Condition
The lower cog wheel in the gear box may rupture, which could result in loss of power and possible loss of control of the sailplane.
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Required Actions
Incorporate flight restrictions into the Limitations Section of the flight manual and fabricate/install a placard near the throttle lever indicating these restrictions.
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Compliance Time
Before further flight
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Affected Aircraft
Stemme GmbH & Co. KG Model STEMME S10-VT sailplanes incorporating part number 11AG gear box (serial numbers 43YYQ001 through 43YYQ093).
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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