# Proposed AD FAA-2006-24171: General Electric Company CF6-50C Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-11-18
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 24, 2009, 74 FR 30018
- Comments due: August 24, 2009
- Became: [AD 2007-11-18](https://openairdocs.org/ad/2007-11-18)
- Docket: FAA-2006-24171 (https://www.regulations.gov/docket/FAA-2006-24171, where comments are filed)
- Project: 2006-NE-08-AD
- FR document: E9-14815
- Official PDF: https://openairdocs.org/files/sha256/ef/00/ef002747cb336b3a01fcb2c1c6cdbc9db6c7d68ac35939769ea081e7bb1ed0ab (from https://www.govinfo.gov/content/pkg/FR-2009-06-24/pdf/E9-14815.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/06/24/E9-14815/airworthiness-directives-general-electric-company-cf6-50c-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/61A130210230BE97862575DF004E2C87.0001
- Page: https://openairdocs.org/proposed/FAA-2006-24171

## Summary

The FAA proposes to revise an existing airworthiness directive (AD) for General Electric Company (GE) CF6-50C series turbofan engines. That AD currently requires reworking certain forward fan stator cases and installing a fan module secondary containment shield. This proposed AD would require the same actions but would eliminate a certain service bulletin from the compliance method. This proposed AD results from a review that shows that only one of the service bulletins referenced in the original AD is applicable as a compliance method. We are proposing this AD revision to prevent uncontained fan blade failures, which can result in separation of airplane hydraulic lines, damage to critical airplane systems, and possible loss of airplane control.

## Notices in this docket

- Apr 17, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-5645, comments due Jun 16, 2006 (https://www.federalregister.gov/documents/2006/04/17/E6-5645/airworthiness-directives-general-electric-company-cf6-50c-series-turbofan-engines)
- Jun 24, 2009: Notice of proposed rulemaking (NPRM)., FR document E9-14815, comments due Aug 24, 2009 (https://www.federalregister.gov/documents/2009/06/24/E9-14815/airworthiness-directives-general-electric-company-cf6-50c-series-turbofan-engines)

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