# Airworthiness Directives; Engine Alliance Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2021-06-11 · Effective 2021-06-28 · 86 FR 31092
## Document
- **Document number:** 2021-12302
- **Category:** airworthiness
- **Manufacturer:** Engine Alliance Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 86 FR 31092
- **Publication date:** 2021-06-11
- **Effective date:** 2021-06-28
- **FAA docket:** Docket No. FAA-2021-0445
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2019-25- 13, which applied to all Engine Alliance (EA) GP7270 and GP7277 model turbofan engines with a certain low-pressure compressor (LPC) 1st-stage fan blade installed. AD 2019-25-13 required an ultrasonic inspection of the affected LPC 1st-stage fan blades and replacement of any affected LPC 1st-stage fan blade that fails the inspection. This AD lowers the initial inspection threshold and requires repetitive ultrasonic inspections on affected LPC 1st-stage fan blades. This AD was prompted by a report of an in-flight shutdown (IFSD) of an engine due to the fracture of multiple LPC 1st-stage fan blades. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/06/11/2021-12302/airworthiness-directives-engine-alliance-turbofan-engines)
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