# Airworthiness Directives; General Electric Company Turbofan Engines
> **Rule** · Final rule. · Published 2020-10-29 · Effective 2020-12-03 · 85 FR 68431
## Document
- **Document number:** 2020-23947
- **Category:** airworthiness
- **Manufacturer:** General Electric Company Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 68431
- **Publication date:** 2020-10-29
- **Effective date:** 2020-12-03
- **FAA docket:** Docket No. FAA-2019-0592
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all General Electric Company (GE) CF6-80C2A5F, -80C2B1F, -80C2B2F, - 80C2B4F, -80C2B5F, -80C2B6F, -80C2B6FA, -80C2B7F, -80C2B8F, -80C2D1F, - 80C2K1F, -80C2L1F, -80E1A2, -80E1A3, -80E1A4, and -80E1A4/B model turbofan engines with a certain hydromechanical unit (HMU) installed. This AD was prompted by a report of fuel coking of the HMU fuel metering valve (FMV) electro-hydraulic servo valves (EHSV) resulting in tailpipe fire. This AD requires removal of the HMU and its replacement with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/10/29/2020-23947/airworthiness-directives-general-electric-company-turbofan-engines)
---
*AI Analytics · CC0 1.0*