# Airworthiness Directives; General Electric Co. (GE) CF34-8E Series Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2008-07-31 · Effective 2008-08-15 · 73 FR 44628
## Document
- **Document number:** E8-17422
- **Category:** airworthiness
- **Manufacturer:** General Electric Co. (GE) CF34-8E Series Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 73 FR 44628
- **Publication date:** 2008-07-31
- **Effective date:** 2008-08-15
- **FAA docket:** Docket No. FAA-2008-0821
## Abstract

The FAA is adopting a new airworthiness directive (AD) for GE CF34-8E series turbofan engines with certain part number (P/N) full authority digital engine controls (FADECs) installed. This AD requires reprogramming the FADEC software from version 8Ev5.40 to an FAA- approved software version. This AD results from six loss of thrust control events from the same software fault scenario. We are issuing this AD to prevent loss of thrust control and controllability of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2008/07/31/E8-17422/airworthiness-directives-general-electric-co-ge-cf34-8e-series-turbofan-engines)
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