AD Amdt-39-10608
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus | Aircraft Ltd | Airworthiness Directives; Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes |
Unsafe Condition
Moisture entering the fuel tank inward vent valve and freezing after a cold soak at altitude could result in wing airfoil distortion and structural damage with consequent degradation of the airplane's handling qualities.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the fuel tank vent valves, drill a 4.8 millimeter hole in each fuel filler cap, and insert a temporary revision in the Pilot's Operating Handbook (POH) to check the hole's clearance from ice and foreign objects. Adds the option to modify the fuel tank vent valves instead of drilling and POH requirements.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 airplanes subject to AD 98-11-01
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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