# Airworthiness Directives; Engine Alliance Turbofan Engines
> **Rule** · Final rule. · Published 2016-01-26 · Effective 2016-03-01 · 81 FR 4165
## Document
- **Document number:** 2016-01268
- **Category:** airworthiness
- **Manufacturer:** Engine Alliance Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 81 FR 4165
- **Publication date:** 2016-01-26
- **Effective date:** 2016-03-01
- **FAA docket:** Docket No. FAA-2015-3585
## Abstract

We are adopting a new airworthiness directive (AD) for certain Engine Alliance (EA) GP7270 turbofan engines. This AD was prompted by the manufacturer informing us that the inspection criteria and repair procedures in the maintenance manual for aft bolt holes of the high- pressure compressor (HPC) cone shaft on the affected engines is incorrect. This AD requires inspection of the HPC cone shaft and repair of affected parts, if needed. We are issuing this AD to prevent failure of the HPC cone shaft, which could lead to uncontained engine failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/01/26/2016-01268/airworthiness-directives-engine-alliance-turbofan-engines)
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