As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THE CARGO COMPARTMENT SMOKE DETECTION SYSTEM - HAD THE CARGO SMOKE WARNING TURN ON WHILE IN FLIGHT, DIVERTED BACK TO KFAR, SMOKE WARNING WENT OFF AFTER LANDING IN KFAR. THE A&P MECHANIC COULD NOT DUPLICATE THE PROBLEM. OPS CHECKED THE FIRE DETECTION SYSTEM IAW EMB-120 AMM 26-14-01. PERFORMED VISUAL INSPECTION OF THE FIRE DETECTORS AND THE GENERAL AREA AROUND THE FIRE DETECTORS. NO DISCREPANCIES NOTED.