As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO HEAT DETECTION SYSTEM WARNING FLICKERED BRIEFLY. NR 1 DISCHARGE LIGHT ILLUMINATED. *S/D* INSPECTION OF THE AIRCRAFT DID NOT INDICATE ANY SMOKE OR FIRE IN THE CARGO COMPARTMENTS. REPLACED CARGO COMPARTMENT SMOKE CONTROL PANEL, DIVERTER VALVE ASSY AND NR 1 BOTTLE.