Regulation & law · 19/11/1999

General Electric Aircraft Engines CF34 Series Turbofan Engines Airworthiness Directive Amendment

The Federal Aviation Administration (FAA) has issued an airworthiness directive amendment for General Electric Aircraft Engines CF34 series turbofan engines, requiring replacement of Buna-N O-rings with Viton O-rings or a new location of the vent groove on the MFC mounting flange to prevent uncommanded engine accelerations and engine overspeed.