# Airworthiness Directives; CFE Company Turbofan Engines
> **Rule** · Final rule. · Published 2017-04-26 · Effective 2017-05-31 · 82 FR 19181
## Document
- **Document number:** 2017-08409
- **Category:** airworthiness
- **Manufacturer:** CFE Company Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 19181
- **Publication date:** 2017-04-26
- **Effective date:** 2017-05-31
- **FAA docket:** Docket No. FAA-2016-9380
## Abstract

We are adopting a new airworthiness directive (AD) for certain CFE Company (CFE) turbofan engines. This AD was prompted by a quality escape for high-pressure compressor (HPC) impellers made from forgings with nonconforming material grain size. This AD requires removal of the HPC impeller. We are issuing this AD to correct the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/04/26/2017-08409/airworthiness-directives-cfe-company-turbofan-engines)
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