As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FROM DAY TO MCI AT FL 310, THE MAIN CARGO SMOKE DETECTOR LIGHT ILLUMINATED. COMPLIED WITH REQUIRED EMERGENCY CHECKLIST. THE LIGHT EXTINGUISHED AT FL 120. AIRCRAFT LANDED AT MCI WITHOUT INCIDENT. NO EVIDENCE OF FIRE NOTED. REPLACED SMOKE DETECTORS AT POSITIONS NR 1, NR 3, AND NR 5 PER MM 26-10-0. OPS CHECK GOOD. (M)