As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THE CARGO SMOKE WARNING INDICATION ILLUMINATED DURING FLIGHT. THE CREW ELECTED TO DISCHARGE THE CARGO BAY FIRE BOTTLES AND THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND NO EVIDENCE OF SMOKE OR FIRE. THE SMOKE DETECTION SYSTEM WAS TESTED, THE FIRE BOTTLES WERE REPLACED, AND THE DISCREPANCY CLEARED.