# Proposed AD FAA-2015-3732: Pratt & Whitney Canada Corp. Turboprop Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-05-13
- Products: Pratt & Whitney Canada
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 10, 2015, 80 FR 69623
- Comments due: January 11, 2016
- Became: [AD 2016-05-13](https://openairdocs.org/ad/2016-05-13)
- Docket: FAA-2015-3732 (https://www.regulations.gov/docket/FAA-2015-3732, where comments are filed)
- Project: 2015-NE-25-AD
- FR document: 2015-28534
- Official PDF: https://openairdocs.org/files/sha256/eb/fa/ebfac2334372d9106d40b8db6f2c00425b94f29dd8a1239d19a14cdf22180e49 (from https://www.govinfo.gov/content/pkg/FR-2015-11-10/pdf/2015-28534.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/11/10/2015-28534/airworthiness-directives-pratt-and-whitney-canada-corp-turboprop-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0D643E744321B3D886257EF90054C932.0001
- Page: https://openairdocs.org/proposed/FAA-2015-3732

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corp. (PWC) PT6A-60AG, -65AG, -67AF, and -67AG turboprop engines. This proposed AD was prompted by incidents of corrosion and perforation of the two-ply Cu-Be bellows in Woodward fuel control units (FCUs). This proposed AD would require removing the Woodward FCU and installing an FCU that is eligible for installation. We are proposing this AD to prevent failure of the Woodward FCU, which could lead to failure of the engine, in-flight shutdown, and loss of control of the airplane.

## Notices in this docket

- Nov 10, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-28534, comments due Jan 11, 2016 (https://www.federalregister.gov/documents/2015/11/10/2015-28534/airworthiness-directives-pratt-and-whitney-canada-corp-turboprop-engines)

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