As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW OBSERVED FWD CARGO FIRE WARNING ACTIVATE. CAUSE OF PROBLEM IS UNDETERMINED. SEVERAL ITEMS WERE ACCOMPLISHED TO FIX PROBLEM INCLUDING CH1924 ADRRESSING THE OUTGASSING OF CERTAIN PRODUCE ITEMS THAT ACCORDING TO THE EXPERTS MAY TRIGGER THE FIRE DETECTION SYSTEM. AS PRECAUTION FORWARD CARGO FIRE DETECTION CARD A31 WAS REPLACED.