# Airworthiness Directives; Engine Alliance Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2018-11-08 · Effective 2018-11-23 · 83 FR 55816
## Document
- **Document number:** 2018-24386
- **Category:** airworthiness
- **Manufacturer:** Engine Alliance Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 83 FR 55816
- **Publication date:** 2018-11-08
- **Effective date:** 2018-11-23
- **FAA docket:** Docket No. FAA-2018-0934
## Abstract

We are adopting a new airworthiness directive (AD) for all Engine Alliance (EA) GP7270, GP7272, and GP7277 turbofan engines with a certain high-pressure turbine (HPT) case installed. This AD requires removal of affected HPT stator cases (HPT cases) from service and their replacement with a part eligible for installation. This AD was prompted by the discovery of a quality escape at a manufacturing facility involving unapproved welds on HPT cases. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/11/08/2018-24386/airworthiness-directives-engine-alliance-turbofan-engines)
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