As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE, ENGINE FIRE LIGHT ON FORWARD PANEL FLASHED INTERMITTENTLY. NR 3 START LEVER, NR 3 ENGINE FIRE HANDLE, AND NR 3 ENGINE LOOP ''A'' ALL CAME ON INTERMITTENTLY AND INCREASED IN FREQUENCY AND INTENSITY. REPLACED A AND B FAN AND CORE LOOP ASSEMBLIES AND FORWARD AND AFT PYLON LOOPS. OPERATIONAL CHECK OK.