As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FIRE WARNING BELL SOUNDED CONTINUOUSLY WITH NO OTHER INDICATIONS AFTER TAKEOFF FROM EWR. THE WARNING SILENCED AFTER PULLING AND RESETTING B18 (WARN ELE B) CIRCUIT BREAKERS. THE FLIGHT CONTINUED TO FLL WHERE IT LANDED WITHOUT FURTHER INCIDENT. NO EVIDENCE OF FIRE WAS FOUND. THE WARNING WAS DETERMINED TO BE A FALSE WARNING. MAINTENANCE REMOVED AND REPLACED THE M1000 MODULE (CIRCUIT BOARD) AT THE P51 WARNING ELECTRONIC UNIT IAW MM 31-51-04, PAGE 401. OPERATIONAL CHECKS WERE GOOD.