As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER ONE ENGINE FIRE WARNING BELL SOUNDED ON FINAL, BUT NO LIGHT. CONTINUED APPROACH AND LIGHT CAME ON DIM AND FLICKERED. ON SHORT FINAL THE LIGHT CAME ON BRIGHT. CREW SHUT DOWN ENGINE AND FIRED BOTH BOTTLES 30 SECONDS PRIOR TO LANDING. *S/D* REPLACED DEFECTIVE LOWER FIRE DETECTOR. REPLACED BOTH EXTINGUISHER BOTTLES, SYSTEM TESTED NORMAL.