As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, THE NR 1 ENGINE FIRE WARNING LIGHT ILLUMINATED. CREW SHUT DOWN THE NR 1 ENGINE AND DISCHARGED THE FIRE BOTTLE. AIRCRAFT RETURNED TO NRT AND LANDED WITHOUT INCIDENT. FOUND THE TURBINE CASE COOLING DUCT BLOWN. REPLACED THE NR 1 ENGINE, OPEATIONAL CHECK GOOD.