# Proposed AD FAA-2010-0514: Pratt & Whitney JT8D-9, -9A, -11, -15, -17, and -17R Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-21-17
- Products: Pratt & Whitney Division
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 19, 2010, 75 FR 27972
- Comments due: July 19, 2010
- Became: [AD 2010-21-17](https://openairdocs.org/ad/2010-21-17)
- Docket: FAA-2010-0514 (https://www.regulations.gov/docket/FAA-2010-0514, where comments are filed)
- Project: 2010-NE-02-AD
- FR document: 2010-11999
- Official PDF: https://openairdocs.org/files/sha256/65/12/6512bd846c6dd28caf6bf4a782b5a31f068d874fc4fad1b67503034e63d90125 (from https://www.govinfo.gov/content/pkg/FR-2010-05-19/pdf/2010-11999.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/05/19/2010-11999/airworthiness-directives-pratt-and-whitney-jt8d-9--9a--11--15--17-and--17r-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4E21AD6D9CA5079586257728004E8CF5.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0514

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for Pratt & Whitney (PW) JT8D-9, -9A, -11, -15, -17, and -17R turbofan engines. This proposed AD would require overhauling fan blade leading edges at the first shop visit after 4,000 cycles-in-service (CIS) since the last total fan blade overhaul was performed. This proposed AD results from reports of failed fan blades. We are proposing this AD to prevent high-cycle fatigue cracking at the blade root, which could result in uncontained failures of first stage fan blades and damage to the airplane.

## Notices in this docket

- May 19, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-11999, comments due Jul 19, 2010 (https://www.federalregister.gov/documents/2010/05/19/2010-11999/airworthiness-directives-pratt-and-whitney-jt8d-9--9a--11--15--17-and--17r-turbofan-engines)

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