As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRE WARNING INDICATION AND BELL, INTERMITTENT, SUSPECTED FROM LWR CARGO BUT CANNOT ISOLATE DUE TO RAPID ONSET AIR DIVERT TO MSP. REMOVED AND REPLACED FIRE WARNING CIRCUIT CARD A8 ON M825 PER MM 26-10-01 AND TESTED PER MM 26-16-00. GRD CHECKS NORMAL. PN ON OFF - 69B47519-3, NSN ON/OFF. PLEASE NOTE L/P 011538 ITEM 2 AND 3.