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 No. 10 position bearings. This AD was prompted by reports of incorrect engine torque for PT6B-37A turboshaft engines. The FAA is issuing this AD to address the unsafe condition on these products.
Directive Details
AD Number
FAA-2018-0739
Document Number
2019-25010
Type
Rule
Publication Date
November 19, 2019
Effective Date
December 24, 2019
Affected Manufacturer
Pratt & Whitney Canada Corp. Turboshaft
Criticality
routine
Emergency
No
Docket ID
Docket No. FAA-2018-0739
Topics
Official Documents
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