AD Amdt-39-10528
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus | Aircraft Ltd | Airworthiness Directives; Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes |
Unsafe Condition
The fuel tank inward vent valve may freeze, which if followed by 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 with modified ones, drill a 4.8 millimeter hole in each fuel filler cap, and insert a temporary POH revision requiring checks to ensure the fuel filler cap hole is clear of ice and foreign objects.
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
Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 airplanes subject to AD 97-23-04
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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