# Airworthiness Directives; General Electric Company CF34-1A, -3A, -3A1, -3A2, -3B, and -3B1 Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2007-04-06 · Effective 2007-04-23 · 72 FR 16998
## Document
- **Document number:** E7-6345
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 72 FR 16998
- **Publication date:** 2007-04-06
- **Effective date:** 2007-04-23
- **FAA docket:** Docket No. FAA-2007-27687
## Abstract

The FAA is superseding an existing airworthiness directive (AD) for General Electric Company (GE) CF34-1A, -3A, -3A1, -3A2, -3B, and -3B1 turbofan engines. That AD requires a onetime inspection of certain fan disks for electrical arc-out indications, replacing fan disks with electrical arc-out indications, and reducing the life limit of certain fan disks. This AD requires the same reduced life limit of certain fan disks, but requires on-wing inspection of certain fan disks installed on regional jets within 500 flight hours after the effective date of this AD. This AD also requires more enhanced shop-level inspections of all fan disks for electrical arc-out defects. This AD results from a report that in January 2007, a 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/2007/04/06/E7-6345/airworthiness-directives-general-electric-company-cf34-1a--3a--3a1--3a2--3b-and--3b1-turbofan)
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