# Proposed AD 2000-NE-30-AD: General Electric Company (GE) CF6-50 Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-12-20
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 24, 2000, 65 FR 70533
- Comments due: January 23, 2001
- Became: [AD 2001-12-20](https://openairdocs.org/ad/2001-12-20)
- Docket: 2000-NE-30-AD
- FR document: 00-29940
- Official PDF: https://openairdocs.org/files/sha256/49/b0/49b07047ef899ec6480f0f74ee58fee13123d0b91303c8fa517a0e9a6772b9fb (from https://www.govinfo.gov/content/pkg/FR-2000-11-24/pdf/00-29940.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/11/24/00-29940/airworthiness-directives-general-electric-company-ge-cf6-50-turbofan-engines
- Page: https://openairdocs.org/proposed/2000-NE-30-AD

## Summary

This amendment proposes the adoption of a new airworthiness directive (AD) that applies to GE CF6-50 turbofan engines. This proposal would require removal of old high pressure compressor (HPC) air ducts and mating hardware and replacement with newly designed air ducts and reworked mating hardware. This proposal is prompted by reports of an uncontained low pressure turbine (LPT) disk failure that resulted from an air duct failure that caused a fan mid shaft (FMS) separation. The actions specified by the proposed AD are intended to prevent HPC air duct failures that could result in FMS failures, that in turn could result in rejected takeoffs or uncontained LPT events.

## Notices in this docket

- Nov 24, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-29940, comments due Jan 23, 2001 (https://www.federalregister.gov/documents/2000/11/24/00-29940/airworthiness-directives-general-electric-company-ge-cf6-50-turbofan-engines)

---
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.