AD 2015-20-11
Unsafe Condition
excessive load on the air brake system
Required Actions
inspect the airbrake bell crank, the airbrake drive funnels, and the airbrake control system for cracks and damage, inspect the airbrake control system for proper clearance, replace each cracked or damaged part with a reinforced part, make all necessary corrective adjustments, install only reinforced airbrake bell cranks and airbrake drive funnels
Compliance Time
Within 40 days after November 18, 2015, and repetitively thereafter at intervals not to exceed 100 hours time-in-service
Affected Aircraft
Schempp-Hirth Flugzeugbau GmbH Model Duo Discus gliders, serial numbers 1 through 639, and Model Duo Discus T gliders, serial numbers 1 through 110 and 112 through 247, certificated in any category
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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