AD 2004-17-04
Unsafe Condition
Elevator flutter, which could cause structural damage and result in loss of control of the sailplane.
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Required Actions
Install additional mass balance in the elevator and ailerons and determine resultant empty weight and empty weight center of gravity; incorporate Revision 2, dated December 4, 2002, in the sailplane maintenance manual; remove the red mark and red placard on the airspeed indicator.
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Compliance Time
Within the next 25 hours time-in-service (TIS)
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Affected Aircraft
Grob-Werke Gmbh & Co KG Models G102 CLUB ASTIR III, G102 CLUB ASTIR IIIb, and G102 STANDARD ASTIR III sailplanes, all serial numbers, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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