As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3804 AIRCRAFT DIVERTED TO BNA DUE TO CARGO FIRE BOTTLE LOW CAUTION MESSAGE. AIRCRAFT LANDED OVER WEIGHT (47,900LBS, MAX 47,000) AT LESS THAN 300 FPM. NO EMERGENCY WAS DECLARED. DEFERRED CARGO BOTTLE IAW MEL 26-25-01, NO OVERWEIGHT INSPECTION REQUIRED DUE TO TCI REQUIREMENTS. AIRCRAFT WAS THEN RELEASED FOR REVENUE FLIGHT.