As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR (3) ENG FIRE WARNING CAME ON DURING CLIMB THROUGH 22KFT. ENG WAS SHUTDOWN IAW AOM PROCEDURE E-12, ACFT FUEL WAS DUMPED, AND ACFT RETURNED TO DEPARTURE. UPON EXTERIOR INSP OF THE ENG, DISCOVERED THE SEALS TO THE HIGH PRESSURE TURBINE (HPT), COOLING TUBE WAS MISSING/BLOWN OUT. ENGINE BOROSCOPE REVEALED INTERNAL DAMAGE TO THE HPT AREA. METAL WAS FOUND IN THE TAIL PIPE. ENGINE WAS REMOVED AND REPLACED. ENG TSLSV: 4773:16 ENG CSLSV:1571 ENG TSI:921:19 ENG CSI: 285