As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE FIRE WARNING NR 3 ENGINE. "A" LOOP SHOWED 8.0 AND "B" LOOP SHOWED 8.5. INDICATION WENT DOWN AWAY AFTER THRUST REDUCED TO IDLE. DUMPED 70,000 LBS OF FUEL AND RETURNED TO PANC. INSPECTED ENGINE AND FOUND TRANSITION DUCT ABOVE HIGH STAGE BLEED VALVE SPLIT AT THE CLAMP. REPLACED TRANSITION DUCT IN ACCORDANCE WITH AMM 36-11-01. LEAK CHECK NORMAL.