As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ON APPROACH, THE NR 2 ENGINE FIRE WARNING ANNUNCIATED. THE CREW DECLARED AN EMERGENCY. THE AIRCRAFT LANDED WITHOUT INCIDENT. A DVI OF THE FIRE-DETECTION SYSTEM WAS PERFORMED, AND THE SENDING ELEMENTS WERE CHECKED FOR RESISTANCE AND CLEANED. THE NR 2 ENGINE FIRE-DETECTION CONTROL UNIT WAS REPLACED, OPS CHECKED GOOD, AND THE AIRCRAFT WAS RETURNED TO SERVICE.