# Airworthiness Directives; General Electric Company CF6 Series Turbofan Engines
> **Rule** · Final rule. · Published 1995-04-12 · Effective 1995-06-12 · 60 FR 18540
## Document
- **Document number:** 95-8712
- **Category:** airworthiness
- **Manufacturer:** General Electric Company CF6 Series Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 60 FR 18540
- **Publication date:** 1995-04-12
- **Effective date:** 1995-06-12
- **FAA docket:** Docket No. 94-ANE-37
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to General Electric Company (GE) CF6-45/-50 series turbofan engines, that requires reduction of the low cycle fatigue (LCF) retirement lives for certain high pressure turbine rotor (HPTR) stage 2 disks, and would provide a drawdown schedule for those affected parts with reduced LCF retirement lives. This amendment is prompted by the results of a refined life analysis performed by the manufacturer which revealed minimum calculated LCF lives significantly lower than published LCF retirement lives. The actions specified by this AD are intended to prevent a LCF failure of the HPTR stage 2 disk, which could result in an uncontained engine failure and damage to the aircraft.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1995/04/12/95-8712/airworthiness-directives-general-electric-company-cf6-series-turbofan-engines)
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