# Airworthiness Directives; Pratt & Whitney JT8D-9, -9A, -11, -15, -17, and -17R Turbofan Engines
> **Rule** · Final rule. · Published 2010-10-08 · Effective 2010-11-12 · 75 FR 62319
## Document
- **Document number:** 2010-25391
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 75 FR 62319
- **Publication date:** 2010-10-08
- **Effective date:** 2010-11-12
- **FAA docket:** Docket No. FAA-2010-0514
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney (PW) JT8D-9, -9A, -11, -15, -17, and -17R turbofan engines. This AD requires 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 AD results from reports of failed fan blades. We are issuing 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/10/08/2010-25391/airworthiness-directives-pratt-and-whitney-jt8d-9--9a--11--15--17-and--17r-turbofan-engines)
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