The Australian Transport Safety Bureau (ATSB) says an uncontained failure of a General Electric CF6-80A engine on an Air New Zealand Boeing 767-200ER in December 2002 was the result of fatigue cracking in the blade slots of a high-pressure turbine disk. GE has already implemented changes to the manufacture and repair shot peening processes that the ATSB says may have contributed to the crack formation. The failure led to mechanical and structural damage to the engine and nacelle, distortion and structural damage to the engine pylon and surface damage to a leading-edge slat.

Source: Flight International