# Proposed AD FAA-2018-0624: Pratt & Whitney Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2019-05-01
- Products: Pratt & Whitney Division
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 10, 2018, 83 FR 50860
- Comments due: November 26, 2018
- Became: [AD 2019-05-01](https://openairdocs.org/ad/2019-05-01)
- Docket: FAA-2018-0624 (https://www.regulations.gov/docket/FAA-2018-0624, where comments are filed)
- FR document: 2018-21693
- Official PDF: https://openairdocs.org/files/sha256/b6/76/b676c67ba42990901548c24a790266e07129106eac49c926c6bff5bb3c9cb892 (from https://www.govinfo.gov/content/pkg/FR-2018-10-10/pdf/2018-21693.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/10/10/2018-21693/airworthiness-directives-pratt-and-whitney-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6B3BEE6746B49F5D862583220046A948.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0624

## Summary

We propose to supersede Airworthiness Directive (AD) 2017-11- 06, which applies to all Pratt & Whitney (PW) PW2037, PW2037D, PW2037M, PW2040, PW2040D, PW2043, PW2143, PW2643, and F117-PW-100 turbofan engine models. AD 2017-11-06 requires initial and repetitive on-wing eddy current inspections (ECIs) of affected engines with certain diffuser and high-pressure turbine (HPT) cases installed. AD 2017-11-06 also requires a fluorescent-penetrant inspection (FPI) of the diffuser case rear flange and the HPT case front flange. Since we issued AD 2017-11-06, we learned of designated engineering representative (DER)- approved diffuser case M-flange replacement repairs. This proposed AD would require an on-wing ECI of all diffuser case M-flange replacement repairs. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 10, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-21693, comments due Nov 26, 2018 (https://www.federalregister.gov/documents/2018/10/10/2018-21693/airworthiness-directives-pratt-and-whitney-turbofan-engines)

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