# Airworthiness Directives; Honeywell International Inc. Turbofan Engines
> **Rule** · Final rule. · Published 2017-09-28 · Effective 2017-11-02 · 82 FR 45173
## Document
- **Document number:** 2017-20776
- **Category:** airworthiness
- **Manufacturer:** Honeywell International Inc. Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 45173
- **Publication date:** 2017-09-28
- **Effective date:** 2017-11-02
- **FAA docket:** Docket No. FAA-2016-9451
## Abstract

We are adopting a new airworthiness directive (AD) for all Honeywell International Inc. (Honeywell) TFE731-20 and TFE731-40 turbofan engines. This AD was prompted by two fan disks found with a manufacturing-caused flaw. This AD requires removing affected fan disks and replacing fan disks with a part eligible for installation. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/09/28/2017-20776/airworthiness-directives-honeywell-international-inc-turbofan-engines)
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