The National Transportation Safety Board is investigating an uncontained engine failure on an American Airlines B-767 that was undergoing testing, June 2, at Los Angeles International Airport.
At 12:27 PST, during a ground maintenance test run, the high-pressure turbine stage one disk on the number one engine (GE CF6-80A2) broke into several pieces that were found embedded in the fuselage, the number two engine, and scattered as far 3,000 feet from the airplane.
Numerous holes punched in the wings by pieces of the engine caused fuel leaks that led to a ground fire that was extinguished by airport fire department personnel.
There were no reported injuries to the three maintenance technicians aboard the airplane at the time of the accident.
NTSB investigators were at the accident scene from June 3 to 7. Pieces of the high-pressure turbine disk were recovered and brought to the NTSB Materials Laboratory in Washington DC, for analysis. Initial examination of the disk pieces found indications of fatigue cracking.
The failed engine has been brought to the American Airlines facility in Tulsa OK, for teardown this week under NTSB supervision.
Click HERE to view photos of the aircraft sent in by an AMT reader.
The National Transportation Safety Board today issued five recommendations to the FAA stemming from an ongoing investigation of an uncontained engine failure on an airliner in Los Angeles.
Four Recent Uncontained Engine Failure Events Prompt NTSB to Issue Urgent Safety Recommendations to FAA
An uncontained engine event occurs when an engine failure results in fragments of rotating engine parts penetrating and exiting through the engine case.