Airworthiness Directive · Amendment 39-10558 · Pilatus Aircraft Ltd. Models PC-6, PC- 6/A, PC-6/B, and PC-6/C Series Airplanes
Pilatus Aircraft Ltd. Models PC-6, PC- 6/A, PC-6/B, and PC-6/C Series Airplanes
Superseded. A later AD replaced this one: AD 2006-13-12. Comply with the one in force.
Models PC-6, PC-6-H1, PC-6-H2, PC-6/350, PC-6/ 350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC-6/ B1-H2, PC-6/B2-H2, PC-6/B2-H4, PC-6/C-H2, and PC-6/C1-H2 airplanes, serial numbers 001 through 915, certificated in any category, that are equipped with turbo-prop engines.
This amendment adopts a new airworthiness directive (AD) that applies to certain Pilatus Aircraft Ltd. (Pilatus) Models PC-6, PC-6/A, PC-6/B, and PC-6/C series airplanes equipped with turbo-prop engines. This AD requires modifying the fuel system to improve the venting between the collector tank, the main wing tanks, and the engine. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. The actions specified by this AD are intended to prevent engine fuel starvation during maximum climb and descent caused by poor fuel tank venting with low fuel levels, which could result in a loss of engine power during critical phases of flight.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
