# Airworthiness Directives; General Electric Company CF6-80E1A2 Series Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 1999-11-26 · Effective 1999-12-13 · 64 FR 66366
## Document
- **Document number:** 99-30624
- **Category:** airworthiness
- **Manufacturer:** General Electric Company CF6-80E1A2 Series Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 64 FR 66366
- **Publication date:** 1999-11-26
- **Effective date:** 1999-12-13
- **FAA docket:** Docket No. 99-NE-52-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to General Electric Company (GE) CF6-80E1A2 series turbofan engines. This action requires removing from service stage 2 high pressure turbine (HPT) disks and impeller spacers prior to exceeding new, lower cyclic life limits and imposes a drawdown program for those parts that currently exceed, or will exceed, the new lower limits. This amendment is prompted by the results of a refined low cycle fatigue (LCF) analysis. The actions specified in this AD are intended to prevent LCF cracking and failure of stage 2 HPT disks and impeller spacers, which could result in an uncontained engine failure and damage to the aircraft.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/11/26/99-30624/airworthiness-directives-general-electric-company-cf6-80e1a2-series-turbofan-engines)
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