As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI - FLIGHT 02457 - CREW RETURNED TO FIELD WHEN THE FORWARD CARGO BAY SMOKE DETECTOR SOUNDED. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND NO EVIDENCE OF SMOKE IN THE CARGO AREA. MAINTENANCE DID FIND THE NUMBER 2 SMOKE DETECTOR CANNON PLUG DISCONNECTED AND RECONNECTED SAME. MAINTENANCE ALSO REPLACED THE NUMBER 3 SMOKE DETECTOR UNIT. OPERATIONAL CHECKS WERE PERFORMED AND CHECKED GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.