AD Amdt-39-10086
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell | crank lever on the rudder | Airworthiness Directives; Burkhart Grob, Luft- und Raumfahrt, Model G 109 Sailplanes |
Unsafe Condition
Rudder vibration problems discovered during testing could result in structural damage and eventual loss of control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a damper and new bell crank lever on the rudder, adjust the weight and balance of the sailplane. For those already modified, perform modification to the damper and bell crank lever and adjust weight and balance.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Burkhart Grob, Luft- und Raumfahrt Model G 109 sailplanes with previous modifications or not
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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