airworthiness · Rule · Final rule. · Published 2014-09-03 · Effective 2014-10-08 · 79 FR 52172
Document
Document number
2014-20453
Federal Register citation
79 FR 52172
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Pratt & Whitney Canada Corp. Turboprop
Publication date
2014-09-03
Effective date
2014-10-08
FAA docket
Docket No. FAA-2013-0766
Abstract
We are adopting a new airworthiness directive (AD) for all Pratt & Whitney Canada Corp. (P&WC) PT6A-114 and PT6A-114A turboprop engines. This AD requires initial and repetitive borescope inspection (BSI) of compressor turbine (CT) blades, and the removal from service of blades that fail inspection. This AD was prompted by several incidents of CT blade failure, causing power loss, and engine failure. We are issuing this AD to prevent failure of CT blades, which could result in damage to the engine and damage to the airplane.