# Airworthiness Directives; General Electric Aircraft Engines (GE) CF34-3A1/-3B/-3B1 Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2007-03-07 · Effective 2007-03-12 · 72 FR 10054
## Document
- **Document number:** E7-3833
- **Category:** airworthiness
- **Manufacturer:** General Electric
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 72 FR 10054
- **Publication date:** 2007-03-07
- **Effective date:** 2007-03-12
- **FAA docket:** Docket No. FAA-2007-27308
## Abstract

This action supersedes emergency airworthiness directive (AD) 2007-04-51 that was sent previously to all known U.S. owners and operators of GE CF34-3A1/-3B/-3B1 turbofan engines. That action required a onetime visual and tactile inspection of certain areas of certain serial number (SN) fan disks for an arc-out defect, within 20 engine flight hours after the effective date of that AD. This AD supersedes AD 2007-04-51 and adds eight SNs to the list of suspect fan disks. This AD results from GE discovering eight additional SNs of fan disks suspected of having an arc-out defect, and from the original report that a GE CF34-3B1 turbofan engine experienced an uncontained fan disk failure during flight operation. We are issuing this AD to prevent an uncontained fan disk failure and airplane damage.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/03/07/E7-3833/airworthiness-directives-general-electric-aircraft-engines-ge-cf34-3a1-3b-3b1-turbofan-engines)
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