As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO COMPARTMENT SMOKE DETECTOR WARNING AFTER TAKEOFF, FOR APPROX 3 MINUTES. MADE UNEVENTFUL PRECAUTIONARY LANDING AT ENG. CAUTION LIGHT WENT OUT PRIOR TO LANDING. CLEANED SMOKE DETECTOR ELECTRICAL CONNECTORS AND REPLACED FWD SMOKE DETECTOR. GROUND OPERATIONAL CHECKED GOOD. (M)