# Proposed AD FAA-2006-25239: General Electric Company Aircraft Engine Group (GEAE) CF6-45A Series, CF6-50A, CF6-50C Series and CF6-50E Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-19-06
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 31, 2007, 72 FR 30300
- Comments due: July 30, 2007
- Became: [AD 2007-19-06](https://openairdocs.org/ad/2007-19-06)
- Docket: FAA-2006-25239 (https://www.regulations.gov/docket/FAA-2006-25239, where comments are filed)
- Project: 2006-NE-23-AD
- FR document: E7-10512
- Official PDF: https://openairdocs.org/files/sha256/5f/0e/5f0e95b2c82768b7dd983c4aaac45f0b726b23da3a4a0cdf155021077e3eb05f (from https://www.govinfo.gov/content/pkg/FR-2007-05-31/pdf/E7-10512.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/05/31/E7-10512/airworthiness-directives-general-electric-company-aircraft-engine-group-geae-cf6-45a-series-cf6-50a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EA4D1339E5DEDCC8862572EC00510BFE.0001
- Page: https://openairdocs.org/proposed/FAA-2006-25239

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for GEAE CF6-45A, 45A2, -50A, -50C, -50CA, -50C1, -50C2, -50C2B, - 50C2D, -50C2F, -50C2R, -50E, -50E1, -50E2, and -50E2B turbofan engines. This proposed AD would require replacing the compressor discharge pressure (CDP) restoring spring assembly on certain main engine controls (MECs) or re-marking MECs that already incorporate GEAE Service Bulletin (SB) No. CF6-50 S/B 73-0119, dated March 21, 2005. This proposed AD results from reports of five events involving fractured CDP restoring spring assemblies. We are proposing this AD to prevent loss of engine thrust control that could lead to loss of control of the airplane.

## Notices in this docket

- May 31, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-10512, comments due Jul 30, 2007 (https://www.federalregister.gov/documents/2007/05/31/E7-10512/airworthiness-directives-general-electric-company-aircraft-engine-group-geae-cf6-45a-series-cf6-50a)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.