# Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2022-06-17 · Effective 2022-07-05 · 87 FR 36390
## Document
- **Document number:** 2022-13088
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney Division Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 87 FR 36390
- **Publication date:** 2022-06-17
- **Effective date:** 2022-07-05
- **FAA docket:** Docket No. FAA-2022-0589
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW4062 model turbofan engines. This AD was prompted by a report of a manufacturing quality escape due to insufficient cooling of the low-pressure turbine (LPT) stage 5 air seal resulting in a reduction of the low-cycle fatigue (LCF) life limit. This AD requires removal and replacement of the LPT stage 5 air seal with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/06/17/2022-13088/airworthiness-directives-pratt-and-whitney-division-turbofan-engines)
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