# Proposed AD FAA-2016-9167: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-08-06
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 7, 2016, 81 FR 88145
- Comments due: January 23, 2017
- Became: [AD 2017-08-06](https://openairdocs.org/ad/2017-08-06)
- Docket: FAA-2016-9167 (https://www.regulations.gov/docket/FAA-2016-9167, where comments are filed)
- Project: 2016-NE-20-AD
- FR document: 2016-28667
- Official PDF: https://openairdocs.org/files/sha256/85/c7/85c705e55c0aa81265c99c381cb64bec9f9dc22227aed12145e80e1ab6308ca7 (from https://www.govinfo.gov/content/pkg/FR-2016-12-07/pdf/2016-28667.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/12/07/2016-28667/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/21A2F8D29401E3B586258082005EF12E.0001
- Page: https://openairdocs.org/proposed/FAA-2016-9167

## Summary

We propose to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) GE90 turbofan engines. This proposed AD was prompted by a report of an engine and airplane fire. This proposed AD would require replacing affected fuel/oil lube/servo coolers (``main heat exchangers'') with a part eligible for installation. We are proposing this AD to prevent failure of a main heat exchanger, which could result in an engine fire.

## Notices in this docket

- Dec 7, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-28667, comments due Jan 23, 2017 (https://www.federalregister.gov/documents/2016/12/07/2016-28667/airworthiness-directives-general-electric-company-turbofan-engines)

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