As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TTPP - ON DESCENT, NR 2 ENGINE HAD INTERMITTENT FIRE WARNING WITH SHORT CIRCUIT GROUND LIGHT. MAINTENANCE INSPECTED ENGINE AND FOUND LOOSE CANNON PLUG ON LOWER FIRE LOOP. TIGHTENED CANNON PLUG AND SYSTEM CHECKED NORMALLY. AIRCRAFT RETURNED TO SERVICE.