As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - ON ENGINE RUN-UP AFTER IDG MAINTENANCE, ONE OF THE LEFT ENGINE TURBINES FAILED. MECHANICS DISCHARGED BOTH BOTTLES WHICH PROVED INEFFECTIVE IN BATTLING THE FIRE. CFR WAS CALLED TO EXTINGUISH THE FIRE. DAMAGE INCLUDES THE WING, PYLON, FLAP AND AILERON AS WELL AS THE ENGINE. INCIDENT IS ATTRIBUTED TO THE FAILURE OF THE STAGE 1 HPT DISK. (M)