AD 2004-11-12
Unsafe Condition
Water ballast in the integral wing water ballast tanks may cause a stronger nose heavy moment than the soft water ballast bags, putting the center-of-gravity (CG) out of acceptable range.
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Required Actions
Install a warning placard in the cockpit within 25 hours time-in-service after July 27, 2004. Determine the forward empty weight CG within the next 50 hours time-in-service after July 27, 2004. If the CG is out of acceptable range, contact the manufacturer for corrective action.
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Compliance Time
Within 25 hours time-in-service for placard installation; within 50 hours time-in-service for CG determination.
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Affected Aircraft
Alexander Schleicher Model ASW 27 sailplanes with serial numbers 27105, 27109, 27110, 27113, 27115, 27116, and 27119 through 27177 equipped with integrated (wet inner surface) water ballast tanks at manufacture, and serial numbers 27001 and up equipped with integrated (wet inner surface) water ballast tanks through wing replacement per Technical Note No. 2.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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