WASHINGTON, June 27 Engine pieces were found on
the runway at a Florida air base after a Lockheed Martin Corp
F-35 A-model fighter jet caught fire while preparing for
takeoff on Monday, according to sources familiar with the
The Air Force is investigating the fire, which occurred in
the rear of the plane, where the jet's engine, built by Pratt &
Whitney, a unit of United Technologies Corp, is located.
The A-model jets have a different engine than the B- and
C-model jets flown by the Marine Corps and the Navy.
The sources, who were not authorized to speak publicly, said
the discovery of the engine parts did not point to specific
cause of the fire and said the investigation was continuing.
(Reporting by Andrea Shalal; Editing by Bill Trott)