Accident: Boeing 767

The failure of the high-pressure turbine (HPT) stage 2 disk, which severed the main engine fuel feed line and breached the right main wing fuel tank, releasing fuel that resulted in a fire on the right side of the airplane during the takeoff roll. The HPT stage 2 disk failed because of low-cycle fatigue cracks that initiated from an internal subsurface manufacturing anomaly that was most likely not detectable during production inspections and subsequent in service inspections using the procedures in place. Contributing to the serious passenger injury was (1) the delay in shutting down the left engine and (2) a flight attendant's deviation from company procedures, which resulted in passengers evacuating from the left overwing exit while the left engine was still operating. Contributing to the delay in shutting down the left engine was (1) the lack of a separate checklist procedure for Boeing 767 airplanes that specifically addressed engine fires on the ground and (2) the lack of communication between the flight and cabin crews after the airplane came to a stop.

NTSB docket DCA17FA021

• Chicago O'Hare International Airport (ORD)1 nm (2 km) north-eastVoydar estimateGreat-circle distance and initial true bearing between the two airport reference points.Version voydar.air.great_circle v1
• Chicago Executive Airport (PWK)9 nm (16 km) northVoydar estimateGreat-circle distance and initial true bearing between the two airport reference points.Version voydar.air.great_circle v1
• Chicago Midway International Airport (MDW)13 nm (25 km) south-eastVoydar estimateGreat-circle distance and initial true bearing between the two airport reference points.Version voydar.air.great_circle v1