# Airworthiness Directives; General Electric Company (GE) CF6-45 Series and CF6-50 Series Turbofan Engines
> **Rule** · Final rule. · Published 2011-08-22 · Effective 2011-09-26 · 76 FR 52213
## Document
- **Document number:** 2011-21312
- **Category:** airworthiness
- **Manufacturer:** General Electric Company (GE) CF6-45 Series and CF6-50 Series Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 76 FR 52213
- **Publication date:** 2011-08-22
- **Effective date:** 2011-09-26
- **FAA docket:** Docket No. FAA-2010-0998
## Abstract

We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires performing a fluorescent penetrant inspection (FPI) of the low-pressure turbine (LPT) rotor stage 3 disk at every shop visit at which the LPT module is separated from the engine. This AD was prompted by seven reports of uncontained failures of LPT rotor stage 3 disks and eight reports of cracked LPT rotor stage 3 disks found during shop visit inspections. We are issuing this AD to prevent LPT rotor separation, which could result in an uncontained engine failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/08/22/2011-21312/airworthiness-directives-general-electric-company-ge-cf6-45-series-and-cf6-50-series-turbofan)
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