As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE AT FL 370 LOWER CARGO COMPARTMENT FIRE WARNING ILLUMINATED. DISCHARGED BOTH FIRE EXTINGUISHERS. CREW RETURNED AND LANDED WITHOUT INCIDENT. UPON LANDING MAINTENANCE INSPECTED ALL LOWER CARGO COMPARTMENTS AND FOUND NO EVIDENCE OF FIRE. REF DMI NR 30653, CAT (C) NFD 10/31/04, IAW ALL APPLICABLE MANUALS AND AIRCRAFT WAS RETURNED TO SERVICE.