As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ON FINAL APPROACH FOR LANDING, THE FORWARD CARGO SMOKE DETECTOR LIGHTS FLICKERED. UPON LANDING, THE ALARM SOUNDED AND REMAINED ON. CREW REQUESTED CFR AND FIRED THE NR 1 CARGO FIRE BOTTLE. MAINTENANCE DID NOT FIND EVIDENCE OF FIRE OR SMOKE IN THE FORWARD CARGO BIN. THE FIRE BOTTLE AND SMOKE CEU WERE REPLACED AND TESTED WITH NO FAULTS FOUND. REPLACED THE FIRE CONTROL PANEL AND TESTED OK. AIRCRAFT RETURNED TO SERVICE.