As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INITIAL CLIMB, THE NR 3 ENGINE EPR DECREASED FOLLOWED BY THE FIRE WARNING FOR NR 3 ENGINE. THE ENGINE WAS SHUT DOWN AND THE FIRE BOTTLE DISCHARGED. AFTER DUMPING FUEL, THE FLIGHT RETURNED TO NRT AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE ENGINE AND FOUND A FAILED HIGH STAGE PNEUMATIC SUPPLY DUCT. THE ENGINE WAS REPLACED.