As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO SMOKE DETECTOR WARNING LIGHT CAME ON INTERMITTENTLY. RETURNED TO FIELD, NO EMERGENCY DECLARED. LANDED WITH NO OTHER PROBLEMS. MEL'ED NR 2 SMOKE DETECTOR. IT WAS FOUND THAT THE CONNECTOR ON NR 2 SMOKE DETECTOR WAS DIRTY. CLEANED CONNECTOR AND OPS CHECK WAS SATISFACTORY.