Airworthiness Directive · Amendment 39-12372 · Fokker Model F27 Mark 050 Series Airplanes Equipped With Pratt & Whitney Canada Model PW127B Engines
Fokker Model F27 Mark 050 Series Airplanes Equipped With Pratt & Whitney Canada Model PW127B Engines
Model F27 Mark 050 series airplanes equipped with Pratt & Whitney Canada Model PW127B engines, certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F27 Mark 050 series airplanes equipped with certain Pratt & Whitney Canada Model PW127B engines. This action requires replacing both torque sensor No. 1 and the electrical connectors on the wiring harness between torque sensor No. 1 and the auto-feathering unit (AFU). This action is necessary to prevent inadvertent autofeathering of the propellers, due to interruption of the torque signal between torque sensor No. 1 and the AFU, which could result in loss of engine power and loss of control of the airplane. This action is intended to address the identified unsafe condition.
