We propose to supersede an existing airworthiness directive (AD) that applies to certain General Electric Company (GE) CF6-80C2 series turbofan engines. The existing AD requires replacement of the fuel tubes connected to the fuel flowmeter. Since we issued that AD, we received several additional reports of fuel leaks and two reports of engine fire due to mis-assembled supporting brackets on the fuel tube connecting the flowmeter to the Integrated Drive Generator (IDG) fuel- oil cooler. This proposed AD would require installing a new simplified one-piece bracket to eliminate mis-assembly. We are proposing this AD to prevent high-pressure fuel leaks caused by improper seating of fuel tube flanges, which could result in an engine fire and damage to the airplane.
Agency Contact: Jason Yang, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7747; fax: 781-238-7199; email: email@example.com.
This is a proposed regulation. Comments were due on October 12, 2012.