AD Amdt-39-10681
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 for ice and foreign objects. Remove the original fuel tank vent valves installed under AD 97-23-04.
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 R1
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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