As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE, THE NUMBER FOUR ENGINE FIRE WARNING INTERMITTENTLY SOUNDED IN LIGHT TURBULENCE. THE FLIGHT CONTINUED TO TOL FOR AND UNEVENTFULL LANDING. MAINTENANCE INSPECTED THE ENGINE AND THE ASSOCIATED WIRING, WITH NO DISCREPANCIES NOTED. MAINTENANCE ACCOMPLISHED A SUCCESSFUL OPERATIONAL TEST IN ACCORDANCE WITH THE MAINTENANCE MANUAL, AND THE AIRCRAFT WAS RETURNED TO SERVICE.