As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3516 - BDL - BAGGAGE AREA SMOKE DETECTOR WENT OFF DURING CRUISE. MAINTENANCE PERFORMED AN INSPECTION OF THE CARGO BAY FOR EVIDENCE OF FIRE AND SMOKE WITH NO EVIDENCE OF EITHER. ALSO PERFORMED AN OPERATIONAL OF THE BAG SMOKE DETECTION SYSTEM WITH NO FAULTS NOTED. COULD NOT DUPLICATE DISCREPANCY.