# Airworthiness Directives; Engine Alliance Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2022-05-06 · Effective 2022-05-23 · 87 FR 26967
## Document
- **Document number:** 2022-09631
- **Category:** airworthiness
- **Manufacturer:** Engine Alliance Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 87 FR 26967
- **Publication date:** 2022-05-06
- **Effective date:** 2022-05-23
- **FAA docket:** Docket No. FAA-2022-0512
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Engine Alliance (EA) GP7270, GP7272, and GP7277 model turbofan engines. This AD was prompted by a manufacturer investigation that revealed certain stages 7-9 compressor rotor spools were manufactured from a billet of material suspected of having foreign material embedded. This AD requires the replacement of the affected stages 7-9 compressor rotor spool. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/05/06/2022-09631/airworthiness-directives-engine-alliance-turbofan-engines)
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