Tue, Jun 13, 2006
Preliminary Reports Focus On Turbine Disk Fatigue
Transportation Safety Board announced Tuesday it will investigate
an uncontained engine failure on an American Airlines Boeing 767
that was undergoing testing June 2 at Los Angeles International
As Aero-News reported, at
12:27 PST, during a ground maintenance test run, the high-pressure
turbine stage one disk on the number one engine, a GE CF6-80A2,
broke into several pieces that were later found embedded in the
fuselage, the number two engine, and scattered as far as 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. Runway
25-right and several taxiways were closed for several hours as
crews removed blast debris, and mopped up the spilled fuel.
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
The failed engine has also been brought to the American Airlines
facility in Tulsa OK, for teardown this week under NTSB
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