# Airworthiness Directives; Honeywell International Inc. Engines
> **Rule** · Final rule. · Published 2023-12-06 · Effective 2024-01-10 · 88 FR 84690
## Document
- **Document number:** 2023-26636
- **Category:** airworthiness
- **Manufacturer:** Honeywell International Inc.
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 88 FR 84690
- **Publication date:** 2023-12-06
- **Effective date:** 2024-01-10
- **FAA docket:** Docket No. FAA-2023-1050
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Honeywell International Inc. (Honeywell) Model AS907-1-1A and AS907-2- 1G engines. This AD was prompted by reports of compressor surge, including a dual engine compressor surge, during takeoff climb out through a steep temperature inversion, causing a loss of engine thrust control. This AD requires either the replacement of a certain electronic control unit (ECU) software version installed on AS907-1-1A engines with updated software or the replacement of certain ECUs installed on AS907-1-1A engines with ECUs eligible for installation. This AD also requires the replacement of certain ECUs installed on AS907-2-1G engines. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2023/12/06/2023-26636/airworthiness-directives-honeywell-international-inc-engines)
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