As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MID CARGO COMPARTMENT FIRE WARNING. LT ILLUM ON PANEL. EXTINGUISHED WITHIN 5 - 7 SECONDS WITH NO ACTIONS FROM CHECKLIST. GOOD SYSTEM AFTERWARD. COULD NOT DUPLICATE FAULT. REMOVED AND REPLACED CARGO DET-FIREX 3-BAY PANEL MODULE P/N ON/OFF 474007 S/N ON 0101 S/N OFF 1198. (LP5835402)