# Proposed AD 2001-NE-33-AD: General Electric Company (GE) CF6-45 and CF6-50 Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2002-02-09
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 30, 2001, 66 FR 54731
- Comments due: December 31, 2001
- Became: [AD 2002-02-09](https://openairdocs.org/ad/2002-02-09)
- Docket: 2001-NE-33-AD
- FR document: 01-27191
- Official PDF: https://openairdocs.org/files/sha256/e8/a4/e8a4fa9a3bd8c46013525c357f0c78057f6809fef1f984c8d0d8c51f3d2f3312 (from https://www.govinfo.gov/content/pkg/FR-2001-10-30/pdf/01-27191.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/10/30/01-27191/airworthiness-directives-general-electric-company-ge-cf6-45-and-cf6-50-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/95BF517DC45E00D686256AF7005CA83F.0001
- Page: https://openairdocs.org/proposed/2001-NE-33-AD

## Summary

The Federal Aviation Administration (FAA) proposes to adopt a new airworthiness directive (AD) that is applicable to GE CF6-45 and CF6-50 series turbofan engines. This proposal would require a reduction of the cyclic life limit for certain low pressure turbine rotor (LPTR) stage 2 disks, and would require removing certain LPTR stage 2 disks from service before exceeding the new, lower cyclic life limit. In addition, the proposal would require removing from service certain LPTR stage 2 disks that currently exceed, or will exceed, the new, lower cyclic life limit according to the compliance schedule described in this proposal. This proposal is prompted by a report of a cracked LPTR stage 2 disk found during a visual inspection. The actions specified by the proposed AD are intended to prevent an uncontained engine failure and damage to the airplane, resulting from cracks in the LPTR stage 2 disk.

## Notices in this docket

- Oct 30, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-27191, comments due Dec 31, 2001 (https://www.federalregister.gov/documents/2001/10/30/01-27191/airworthiness-directives-general-electric-company-ge-cf6-45-and-cf6-50-series-turbofan-engines)

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