As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE DETECTOR NR 3 LIGHT CAME ON INTERMITTENTLY IN FLIGHT. VERIFIED NO SMOKE IN CARGO COMPARTMENT. MAINTENANCE PERFORMED AN OPERATIONAL TEST OF THE SMOKE DETECTION SYSTEM. NO DEFECTS WERE FOUND AND THE AIRCRAFT WAS RETURNED TO SERVICE.