As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE FIRE WARNING BELL SOUNDED ON LONG FINAL, BUT NO LIGHT. CONTINUED APPROACH AND LIGHT CAME ON DIM AND FLICKERED. ON SHORT FINAL, THE LIGHT CAME ON BRIGHT. SHUT DOWN ENGINE AND FIRED BOTH BOTTLES 30 SECONDS PRIOR TO LANDING. THE LOWER FIRE LOOP ON NR 1 ENGINE WAS CHAFED/GROUNDED. THE SENSOR/RESPONDER WAS REPLACED AND THE FIRE DETECTION SYSTEM CHECKED OKAY.