AD 2019-22-03
Effective 12/24/2019 · Published 11/19/2019
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Summary
The FAA is superseding Airworthiness Directive (AD) 2015-20-04 for certain Pratt & Whitney Canada Corp. (P&WC) PT6B-37A turboshaft engines. AD 2015-20-04 required initial and repetitive inspections until replacement of the No. 10 bearing, and eventual replacement of the No. 9 bearing, both located in the engine reduction gearbox (RGB) assembly. This AD requires removal from service and replacement of the No. 9 and N…