As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT INSP, AIRCREW NOTICED THAT THE "SMOKE" WARNING LIGHT ILLUMINATED TRIGGERING THE "MASTER" WARNING LIGHT. GROUND CREW CLEANED THE CONNECTORS ON BOTH THE NR 1 AND 2 SMOKE DETECTOR CONNECTORS AS WELL AS INSPECTED THE WIRING. PERFORMED SYSTEM CHECKS AND THEY WERE SATISFACTORY. ACFT RELEASED FOR FLIGHT STATUS.