# Proposed AD FAA-2007-28319: General Electric Company (GE) CF6- 80C2D1F Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-22-07
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 17, 2007, 72 FR 39039
- Comments due: September 17, 2007
- Became: [AD 2007-22-07](https://openairdocs.org/ad/2007-22-07)
- Docket: FAA-2007-28319 (https://www.regulations.gov/docket/FAA-2007-28319, where comments are filed)
- Project: 2007-NE-27-AD
- FR document: E7-13835
- Official PDF: https://openairdocs.org/files/sha256/29/90/29909291878c069d32b383020decbaeb34884119e16e2a74e5dc7e4c1b18d1ec (from https://www.govinfo.gov/content/pkg/FR-2007-07-17/pdf/E7-13835.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/07/17/E7-13835/airworthiness-directives-general-electric-company-ge-cf6-80c2d1f-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/78A34A1066EE14B98625731B004A732C.0001
- Page: https://openairdocs.org/proposed/FAA-2007-28319

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for GE CF6-80C2D1F turbofan engines, installed on McDonnell Douglas Corporation MD-11 series airplanes. This proposed AD would require removing previous software versions from the engine electronic control unit (ECU). Engines with new version software will have increased margin to flameout. This proposed AD results from reports of engine flameout events during flight, including reports of events where all engines simultaneously experienced a flameout or other adverse operation. Although the root cause investigation is not yet complete, we believe that exposure to ice crystals during flight is associated with these flameout events. We are proposing this AD to minimize the potential of an all-engine flameout event caused by ice accretion and shedding during flight.

## Notices in this docket

- Jul 17, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-13835, comments due Sep 17, 2007 (https://www.federalregister.gov/documents/2007/07/17/E7-13835/airworthiness-directives-general-electric-company-ge-cf6-80c2d1f-turbofan-engines)

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