# Proposed AD FAA-2013-0740: Pratt & Whitney Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-05-32
- Products: Pratt & Whitney
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 22, 2016, 81 FR 93855
- Comments due: February 6, 2017
- Became: [AD 2014-05-32](https://openairdocs.org/ad/2014-05-32)
- Docket: FAA-2013-0740 (https://www.regulations.gov/docket/FAA-2013-0740, where comments are filed)
- Project: 2013-NE-24-AD
- FR document: 2016-30114
- Official PDF: https://openairdocs.org/files/sha256/01/89/0189896229db9904c9e8e07e9159a28faafbb82a634833b116423b78c3711691 (from https://www.govinfo.gov/content/pkg/FR-2016-12-22/pdf/2016-30114.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/12/22/2016-30114/airworthiness-directives-pratt-and-whitney-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/88AA342098D52E4E8625809100561C8D.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0740

## Summary

We propose to supersede Airworthiness Directive (AD) 2014-05- 32, which applies to all Pratt & Whitney (PW) PW2037, PW2037D, PW2037M, PW2040, PW2040D, PW2043, PW2143, PW2643, and F117-PW-100 turbofan engines. AD 2014-05-32 currently requires one-time eddy current inspection (ECI) of affected engines with certain diffuser and HPT cases installed. AD 2014-05-32 also requires a fluorescent-penetrant inspection (FPI) of the diffuser case rear flange and the HPT case front flange. Since we issued AD 2014-05-32, the manufacturer determined through analysis that the inspections required by AD 2014- 05-32 are not adequate to maintain safety. This proposed AD would add additional repetitive, on-wing ECI inspections. We are proposing this AD to correct the unsafe condition on these products.

## Notices in this docket

- Oct 29, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-25459, comments due Dec 30, 2013 (https://www.federalregister.gov/documents/2013/10/29/2013-25459/airworthiness-directives-pratt-and-whitney-turbofan-engines)
- Dec 22, 2016: Notice of proposed rulemaking (NPRM)., FR document 2016-30114, comments due Feb 6, 2017 (https://www.federalregister.gov/documents/2016/12/22/2016-30114/airworthiness-directives-pratt-and-whitney-turbofan-engines)

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