# Proposed AD FAA-2009-0121: General Electric Company (GE) CF6- 80C2B5F Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-14-08
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 20, 2009, 74 FR 7831
- Comments due: April 21, 2009
- Became: [AD 2009-14-08](https://openairdocs.org/ad/2009-14-08)
- Docket: FAA-2009-0121 (https://www.regulations.gov/docket/FAA-2009-0121, where comments are filed)
- Project: 2008-NE-36-AD
- FR document: E9-3609
- Official PDF: https://openairdocs.org/files/sha256/c0/94/c09477f611fbe21e1bc99b696816df7065a68e16379a9d22d8092eb3286c4ad8 (from https://www.govinfo.gov/content/pkg/FR-2009-02-20/pdf/E9-3609.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/02/20/E9-3609/airworthiness-directives-general-electric-company-ge-cf6-80c2b5f-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BAC91AE3D32E79AF8625756300729E8F.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0121

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for GE CF6-80C2B5F turbofan engines. This proposed AD would require removing certain part number (P/N) high-pressure compressor rotor (HPCR) 11-14 spool/shafts before they exceed a new, reduced life limit. This proposed AD results from an internal GE audit that compared the life limited parts certification documentation to the airworthiness limitations section (ALS) of the instructions for continuing airworthiness (ICA). We are proposing this AD to prevent HPCR 11-14 spool/shaft fatigue cracks caused by exceeding the life limit, which could result in a possible uncontained failure of the HPCR spool/shaft and damage to the airplane.

## Notices in this docket

- Feb 20, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-3609, comments due Apr 21, 2009 (https://www.federalregister.gov/documents/2009/02/20/E9-3609/airworthiness-directives-general-electric-company-ge-cf6-80c2b5f-turbofan-engines)

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