As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT RETURNED TO BASE AFTER THE FLIGHT CREW RECEIVED A SMOKE MASTER WARNING INDICATION ON DEPARTURE. UPON RETURN, MX ACTION FOUND A BROKEN WIRE IN THE NR 1 SMOKE DETECTOR CONNECTOR 2612-P2. ALL WIRES IN CONNECTOR WERE SOLDERED & THE SYS WAS CHECKED SERVICEABLE. ACFT CYCLES 57842. ACFT HOURS 56771:09.