AD 2009-08-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus | AIRCRAFT LTD | Airworthiness Directives; PILATUS AIRCRAFT LTD. Models PC-12 and PC-12/45 Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; PILATUS AIRCRAFT LTD. Models PC-12 and PC-12/45 Airplanes |
Unsafe Condition
The Deice Pressure Regulator has vented too much hot air into the forward compartment, damaging the oxygen cylinder ON/OFF cable, the Ram-Air Scoop cable, and the ECS firewall shut-off valve cable. If incorrectly adjusted or defective, the Deice Pressure Regulator can vent hot air into the forward compartment, causing overheating and failures of components inside, which could result in potential loss of several functions essential for safe flight.
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Required Actions
Install an overboard vent for the airfoil deice system pressure regulator (Modification Kit Number 500.50.12.332) following the Accomplishment Instructions in PILATUS AIRCRAFT LTD. PC12 Service Bulletin No. 30-011, dated July 9, 2008.
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Compliance Time
Within 3 months after May 26, 2009
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Affected Aircraft
PILATUS AIRCRAFT LTD. Models PC-12 and PC-12/45 airplanes, manufacturer's serial numbers (MSN) 101 through MSN 320, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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