As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, HAD THE MASTER FIRE WARNING LIGHT AND BELL SOUNDED FOR 1 TO 3 SECONDS THEN STOPPED. IT HAPPENED AGAIN 3 OR 4 TIMES. THERE WERE NO OTHER FIRE INDICATIONS IN ANY ENGINE FIRE HANDLE, APU, OR CARGO. FLIGHT CONTINUED ON AND LANDING WAS UNEVENTFUL. MAINTENANCE REMOVED AND REPLACED FIRE WARNING CARDS A6 THRU A11 AND A5 AND A12. OPERATIONAL CHECKED GOOD AND AIRCRAFT RETURNED TO SERVICE.