# Airworthiness Directives; General Electric Company CF6-80A Series Turbofan Engines
> **Rule** · Final rule. · Published 2009-04-01 · Effective 2009-05-06 · 74 FR 14719
## Document
- **Document number:** E9-7280
- **Category:** airworthiness
- **Manufacturer:** General Electric Company CF6-80A Series Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 74 FR 14719
- **Publication date:** 2009-04-01
- **Effective date:** 2009-05-06
- **FAA docket:** Docket No. FAA-2008-1206
## Abstract

The FAA is adopting a new airworthiness directive (AD) for General Electric Company (GE) CF6-80A series turbofan engines with a high-pressure turbine rotor (HPTR) stage 1 disk, part number (P/N) 9367M45G06, installed. This AD requires removing any HPTR stage 1 disk, P/N 9367M45G06, before exceeding 2,075 cycles-since-new (CSN). This AD results from an error by GE that incorrectly cited a cyclic life of 12,600 CSN for the HPTR stage 1 disk, P/N 9367M45G06. We are issuing this AD to prevent the HPTR stage 1 disk from exceeding its part life, which could cause fatigue cracks to start and grow. These cracks could result in a possible uncontained disk failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/04/01/E9-7280/airworthiness-directives-general-electric-company-cf6-80a-series-turbofan-engines)
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