As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING CARGO SMOKE LGHT ILLUMINATED VERIFIED VISUALLY NO SMOKE FOR FIRE, COULD NOT EXTINGUISH LIGHT. GENERATED FROM PILOT REPORT. TROUBLESHOOTING FOUND LIGHT WOULD GO OUT WITH NR 4 SMOKE DETECTOR DISCONNECTED. REPLACED NR 4 SMOKE DETECTOR. CHECKS NORMAL PER AERONAUTICAL MM CHAPTER 1. (M)