As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB, NR 3 ENGINE FIRE WARNING INDICATION AT APPROXIMATELY 2,000 FEET. ENGINE START LEVER MOVED TO CUT-OFF POSITION AND FIRE WARNING INDICATION EXTINGUISHED. FUEL DUMPED AND AIRCRAFT LANDED. WIRE CHAFED UNDER CLAMP, WIRE REPAIRED.