As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STA-OAK: ON CLIMB 250 KTS/10000. ADVANCED THROTTLE FOR CLIMB AND NR 2 ENG FIRE WARNING ILLUMINATED B-LOOP WAS CHECKED AND TURNED OFF. LEVELED OFF THEN STARTED TO CLIMB AGAIN. FIRE WARNING ILLUMINATED AGAIN THEN GOT HOT AIR SUPPLY OVERHEAT. RETURNED TO OAK. FOUND RUPTURED HIGH PRESS DUCT. REMOVED AND REPLACED DUCT PERFORM ENG RUN PER JRH. NO LEAKS NOTED.