# Proposed AD FAA-2019-0592: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-22-02
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 6, 2019, 84 FR 46896
- Comments due: October 21, 2019
- Became: [AD 2020-22-02](https://openairdocs.org/ad/2020-22-02)
- Docket: FAA-2019-0592 (https://www.regulations.gov/docket/FAA-2019-0592, where comments are filed)
- FR document: 2019-19169
- Official PDF: https://openairdocs.org/files/sha256/a6/09/a6099af4506b65ac3b36ba23addc64d88887b55c675c66e9ca7807531e0c19e9 (from https://www.govinfo.gov/content/pkg/FR-2019-09-06/pdf/2019-19169.pdf)
- Federal Register: https://www.federalregister.gov/documents/2019/09/06/2019-19169/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/297C6CB5A2A924F88625846D00438C42.0001
- Page: https://openairdocs.org/proposed/FAA-2019-0592

## Summary

The FAA proposes to adopt 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 proposed 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 proposed AD would require removal of the HMU and replacement with a part eligible for installation. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 6, 2019: Notice of proposed rulemaking (NPRM). (first notice), FR document 2019-19169, comments due Oct 21, 2019 (https://www.federalregister.gov/documents/2019/09/06/2019-19169/airworthiness-directives-general-electric-company-turbofan-engines)

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