Australian investigators have confirmed that a first-stage high-pressure turbine (HPT) disc burst caused last month's uncontained failure of a General Electric CF6-80A engine on an Air New Zealand (ANZ) Boeing 767-200ER. The Australian Transport Safety Bureau (ATSB) says in a preliminary report that an examination of the HPT disc at its Canberra laboratory found a fracture that had occurred from an area of fatigue cracking, originating from the bottom of a turbine blade "dovetail slot". The incident occurred on 8 December as the ANZ 767 was operating a scheduled service between Brisbane and Auckland.
Source: Flight International
