AD 2007-21-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus | Aircraft Ltd | Airworthiness Directives; Pilatus Aircraft Ltd. Models PC-12, PC-12/45, and PC-12/47 Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Pilatus Aircraft Ltd. Models PC-12, PC-12/45, and PC-12/47 Airplanes |
Unsafe Condition
Abrasive damage (chafing) has been found on oil pipe assemblies in the area of the torque oil pressure transducer on the engines of some PC-12 aircraft. Incorrect assembly after maintenance tasks can decrease distances between various pipe/hoses assemblies and adjacent components, leading to damaged pipes and oil leakages in the engine area.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect for damage on oil pipe assemblies. Replace damaged pipe assemblies. Eventually replace all affected pipe/hose assemblies.
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Compliance Time
Before further flight
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Affected Aircraft
Pilatus Aircraft Ltd. Models PC-12, PC-12/45, and PC-12/47 airplanes, all serial numbers, equipped with oil pipe/hose assemblies part numbers 577.11.12.104, 577.11.12.105, 946.37.74.305, 946.37.74.306, 946.37.74.307, 946.37.74.308, or 946.37.74.311, and certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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