As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOWER AFT CARGO COMPARTMENT FIRE WARNING LIGHT ILLUMINATED AND BELL SOUNDED (WITH CARGO HEAT ON). INSPECTED LOWER AFT CARGO COMPT FOR SIGNS OF FIRE. NO INDICATION OF FIRE FOUND. CANNOT DUPLICATE ON GROUND. INSPECTED THE CARGO HEATING SYSTEM. NO DEFECTS FOUND.