AD 75-16-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus Aircraft Limited | B4-PC11 | Airworthiness Directives; Pilatus Model B4-PC11 Gliders |
Unsafe Condition
Rudder control cables may experience chaffing, jamming, or separation adjacent to the crotch strap attachment brackets.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect rudder control cables for chaffing near the crotch strap attachment brackets and repair or replace as required per Pilatus Maintenance Manual or FAA-approved equivalent. Install polyurethane foam block P/N 112.50.11.065 on the pilot seat underside to cover the crotch strap bracket per Pilatus Service Bulletin No. 1002 or FAA-approved equivalent.
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Compliance Time
Within 10 hours' time in service after the effective date of this AD for inspection and repair/replace; within 25 hours' time in service after the effective date for installing the foam block.
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Affected Aircraft
Pilatus Aircraft Limited Model B4-PC11 gliders, serial numbers 141 and subsequent.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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