As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 1 ENGINE FIRE WARNING LIGHT AND BELL ACTIVATED DURING CLIMB-OUT OF MIA. CHECKLIST PROCEDURES WERE COMPLIED WITH AND THE AIRCRAFT WAS RETURNED TO MIA WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 2 ENGINE ANTI-ICE DUCT FROM NOSE COWL TO SADDLE DUCT BLOWN. THE DUCT WAS REMOVED AND REPLACED. LEAK AND OPERATIONAL CHECKS WERE GOOD.