# Airworthiness Directives; Honeywell International Inc. Turbofan Engines
> **Rule** · Final rule. · Published 2018-03-08 · Effective 2018-04-12 · 83 FR 9797
## Document
- **Document number:** 2018-04614
- **Category:** airworthiness
- **Manufacturer:** Honeywell International Inc. Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 9797
- **Publication date:** 2018-03-08
- **Effective date:** 2018-04-12
- **FAA docket:** Docket No. FAA-2017-0020
## Abstract

We are adopting a new airworthiness directive (AD) for certain Honeywell International Inc. AS907 series turbofan engines. This AD was prompted by seven loss-of-thrust-control events attributed to water intrusion of the engine electronic control unit (ECU). This AD requires applying sealant to identified areas of the ECU and requires inserting a copy of certain airplane operating procedures into the applicable flight manuals. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/03/08/2018-04614/airworthiness-directives-honeywell-international-inc-turbofan-engines)
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