AD 2004-04-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus | Aircraft Ltd | Airworthiness Directives; Pilatus Aircraft Ltd. Models PC-7, PC-12, and PC-12/45 Airplanes |
Unsafe Condition
Extrusion of gasket material from the joints between the engine-driven pump housing, relief valve housing, and relief valve cover, as well as inadequate torque on relief valve attachment screws, could lead to fuel leakage and a fire in the engine compartment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the joints between the engine-driven pump housing, relief valve housing, and relief valve cover for signs of fuel leakage and extruding gasket material. Replace any engine-driven pump with the above problems. Ensure that the relief valve attachment screws are adequately torqued and re-torque as necessary. Eventually replace the pump with an improved design pump.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pilatus Aircraft Ltd. Models PC-7, PC-12, and PC-12/45 airplanes that incorporate a certain engine-driven pump.
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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