AD Amdt-39-10217
Unsafe Condition
Cracked airbrake over-center levers found during routine inspections could result in asymmetrical airbrake deployment, leading to uncontrollable roll and possible loss of control.
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Required Actions
Replace the airbrake over-center lever with improved-design parts (Grob P/N 103B-4123/4124 or FAA-approved equivalents) per Grob Service Bulletin TM 315-47/2 and Repair Instructions 315-45/2. Install new inspection holes following Grob Repair Instructions 315-45/2. Use dimensions from materials list on page one of Repair Instructions for composite sheet dimensions.
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Compliance Time
Within the next 50 hours time-in-service after the effective date (December 29, 1997)
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Affected Aircraft
Burkhardt Grob Luft-und Raumfahrt GmbH Model G 103 Twin Astir sailplanes, serial numbers 3000 through 3291 (with or without 'T' suffix)
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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