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Airworthiness Directive

AD 2001-20-01 66 FR 49823 Active

Federal Aviation Administration · 14 CFR part 39

FR document
01-24270
Amendment
39-12447
Published
2001-10-01
Effective
2001-11-05
Models covered
1
Last live check
2026-10-02

Printed from https://aircraftdirectives.com/ad/2001-20-01 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

This page is a reference Record, not an airworthiness or compliance determination. Official FAA and manufacturer sources control over our restatement, subject to governing law. Check applicability, current requirements and incorporated documents before acting. The owner or operator remains responsible for airworthiness and required records under 14 CFR 91.403 and 91.417, as applicable. Terms of Use: /terms.

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AD

2001-20-01

FR doc 01-24270 · 66 FR 49823

AD 2001-20-01Published 2001-10-01Effective 2001-11-05

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.

Requires initial and repetitive visual inspections, and eventual replacement of the compressor bleed valve assembly, with a redesigned valve assembly for -114A and -25C engines.

Full official abstract

This amendment adopts a new airworthiness directive (AD), applicable to Pratt & Whitney Canada (PWC) PT6A-25C and -114A turboprop engines. This amendment will require initial and repetitive visual inspections, and eventual replacement of the compressor bleed valve assembly, with a redesigned valve assembly for -114A and -25C engines. This amendment is prompted by reports of two occurrences of uncommanded engine power loss. The actions specified by this AD are intended to detect wear in the compressor bleed valve assembly which may cause valve orifice blockage, resulting in a loss of power, an inability to accelerate the engine, and an in-flight shutdown.

More directives for Pratt & Whitney Canada PT6A

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  2. AD 2022-08-13 Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines 2022-04-22
  3. AD 2016-05-13 Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines 2016-03-18
  4. AD 2014-17-08 Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines 2014-09-03
  5. AD 2012-09-10 Airworthiness Directives; Pratt & Whitney Canada Turboprop Engines 2012-05-08

All Pratt & Whitney Canada PT6A directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab)

Applies to 1 model in our index