# Proposed AD FAA-2004-19463: General Electric Company CF6-45A, CF6-50A, CF6-50C, and CF6-50E Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-07-05
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 27, 2004, 69 FR 62623
- Comments due: December 27, 2004
- Became: [AD 2005-07-05](https://openairdocs.org/ad/2005-07-05)
- Docket: FAA-2004-19463 (https://www.regulations.gov/docket/FAA-2004-19463, where comments are filed)
- Project: 2004-NE-14-AD
- FR document: 04-24035
- Official PDF: https://openairdocs.org/files/sha256/63/18/63183864a2c8ad0a079b007302c32c259fe8e7c336dbe6638287587fc32ccb63 (from https://www.govinfo.gov/content/pkg/FR-2004-10-27/pdf/04-24035.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/10/27/04-24035/airworthiness-directives-general-electric-company-cf6-45a-cf6-50a-cf6-50c-and-cf6-50e-series
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9C2FC48C487B5FA486256F3A005A9BB8.0001
- Page: https://openairdocs.org/proposed/FAA-2004-19463

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for General Electric Company (GE) CF6-45A, CF6-50A, CF6-50C, and CF6-50E series turbofan engines that have not incorporated GE Service Bulletin (SB) No. CF6-50 S/B 72-1239, Revision 1, dated September 24, 2003, or that have not incorporated paragraph 3.B. of GE SB No. CF6-50 S/B 72-1239, original issue, dated May 29, 2003. This proposed AD would require inspecting the stage 1 low pressure turbine (LPT) blades for damage and replacement of the LPT module if necessary. This proposed AD results from a report of a stud that separated from a turbine mid frame (TMF) strut and from an updated analysis of strut stud failures. We are proposing this AD to prevent an uncontained failure of the engine and possible damage to the airplane caused by failure of TMF strut studs.

## Notices in this docket

- Oct 27, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-24035, comments due Dec 27, 2004 (https://www.federalregister.gov/documents/2004/10/27/04-24035/airworthiness-directives-general-electric-company-cf6-45a-cf6-50a-cf6-50c-and-cf6-50e-series)

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