NTSB Press Release

National Transportation Safety Board
Office of Public Affairs


NTSB INVESTIGATING AIRLINER UNCONTAINED ENGINE FAILURE

June 13, 2006

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.

NTSB Office of Public Affairs: (202) 314-6100

 

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The National Transportation Safety Board (NTSB) is an independent federal agency charged with determining the probable cause
of transportation accidents, promoting transportation safety, and assisting victims of transportation accidents and their families.