# Airworthiness Directives; General Electric Aircraft Engines CF34 Series Turbofan Engines
> **Rule** · Final rule. · Published 2000-02-17 · Effective 2000-02-17 · 65 FR 8039
## Document
- **Document number:** 00-3336
- **Category:** airworthiness
- **Manufacturer:** General Electric
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 65 FR 8039
- **Publication date:** 2000-02-17
- **Effective date:** 2000-02-17
- **FAA docket:** Docket No. 98-ANE-19-AD
## Abstract

This amendment revises an existing airworthiness directive (AD), that is applicable to General Electric Aircraft Engines (GE) CF34 series turbofan engines. That AD currently requires: (1) Replacement of Buna-N O-rings with Viton O-rings; or (2) A new location of the vent groove on the MFC mounting flange; or (3) Installation of an MFC with improved overspeed protection.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/02/17/00-3336/airworthiness-directives-general-electric-aircraft-engines-cf34-series-turbofan-engines)
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