AD 2020-18-05
Effective 10/07/2020 · Published 09/02/2020
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Summary
The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney Canada Corp. (P&WC) PT6B-37A model turboshaft engines with engine serial number PCE-PU0289 and earlier. This AD was prompted by a report of contamination from galvanic corrosion between the fuel control unit (FCU) aluminum body and the steel union fitting causing the loss of engine control, resulting in an engine over-speed condition and…