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Airworthiness Directive

AD 2014-17-08 R1 80 FR 24791 Active

Federal Aviation Administration · 14 CFR part 39

Prompted by P&WC development of an additional single crystal CT blade that corrects the unsafe condition.

Federal Register (opens in a new tab)

FR document
2015-10075
Amendment
39-18149
Published
2015-05-01
Effective
2015-06-05
Models covered
1

Last live check: 2026-08-19

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AD

2014-17-08 R1

FR doc 2015-10075 · 80 FR 24791

AD 2014-17-08 R1Published 2015-05-01Effective 2015-06-05

Revises 2014-17-08

Supersedence is read from the Federal Register text of the newer AD — the FAA publishes no structured field for it — and names only ADs held in our index.

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Prompted by P&WC development of an additional single crystal CT blade that corrects the unsafe condition.

Full official abstract

We are revising airworthiness directive (AD) 2014-17-08 for all Pratt & Whitney Canada Corp. (P&WC) PT6A-114 and PT6A-114A turboprop engines. AD 2014-17-08 required initial and repetitive borescope inspections (BSIs) of compressor turbine (CT) blades, and the removal from service of blades that fail inspection. This new AD adds an additional single crystal CT blade, reduces the affected population, and corrects the Credit for Previous Action paragraph. This AD was prompted by P&WC development of an additional single crystal CT blade that corrects the unsafe condition. We are issuing this AD to prevent failure of CT blades, which could result in damage to the engine and damage to the airplane.

More directives for Pratt & Whitney Canada PT6A

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  2. AD 2022-08-13 Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines Effective 2022-05-27
  3. AD 2016-05-13 Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines Effective 2016-04-22
  4. AD 2014-17-08 Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines Effective 2014-10-08
  5. AD 2012-09-10 Airworthiness Directives; Pratt & Whitney Canada Turboprop Engines Effective 2012-05-23

All Pratt & Whitney Canada PT6A directives

View on Federal Register (opens in a new tab) Search DRS manually for AD 2014-17-08 R1 (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index