Airworthiness Directive · Amendment 39-10853 · General Electric Company CF6-6, -45, - 50, -80A, and -80C2 Series Turbofan Engines
General Electric Company CF6-6, -45, - 50, -80A, and -80C2 Series Turbofan Engines
General Electric Company (GE) CF6-6, -45, -50, - 80A, and -80C2 series turbofan engines, with stage 1 fan disks installed, identified by serial numbers (S/Ns) in the following GE Alert Service Bulletins (ASBs): CF6-6 ASB 72-A996, Revision 4, dated June 9, 1998; CF6-50 ASB 72-A988, Revision 6, dated August 25, 1998; CF6-80A ASB 72-A565, Revision 5, dated June 9, 1998; and CF6-80C2 ASB 72-A478, Revision 4, dated June 9, 1998. These engines are installed on but not limited to Boeing 747 and 767, Airbus A300 and A310, McDonnell Douglas DC-10 and McDonnell Douglas MD-11 series aircraft.
This amendment adopts a new airworthiness directive (AD) that is applicable to General Electric Company CF6-6, -45, -50, -80A, and - 80C2 series turbofan engines. This action requires, prior to further flight, an ultrasonic immersion inspection for cracks in stage 1 fan disks, and, if necessary, replacement with serviceable parts. This amendment is prompted by reports of cracked fan disks found during routine shop inspections on fan disks manufactured between late 1984/ early 1985. The actions specified in this AD are intended to prevent fan disk failure due to cracks, which could result in an uncontained engine failure and damage to the aircraft.
