As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING T/O AND CLIMB, TOWER NOTICED AND NOTIFIED FLT 6703 THAT SMOKE WAS TRAILING FROM NR 4 ENGINE. AT 6500 FEET CREW REPORTED A BANG AND ASSOCIATED ROLL BACK OF N1/N2. CREW FOLLOWED SEVERE ENGINE DAMAGE CKLIST. FUEL DUMPED AND AIRCRAFT 526 ON FLT 6703 RETURNED TO PHL. REMOVED AND REPLACED NR 4 ENG ASSY IAW MM TASK CARD 5000 PG 1-27.