What was found
(CAN) DURING CRUISE THE CREW RECEIVED A MAIN BATTERY HOT WARNING MESSAGE. THE HIGH TEMP WAS CONFIRMED ON THE BATTERY TEMP MONITOR. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE BATTERY TEMPERATURE WAS EVALUATED AT 180°C. THE BATTERY COMPARTMENT WAS CLEANED, THE BATTERY REPLACED. ACFT WAS RELEASED AND RETURNED INTO SERVICE. BATTERY HAS BEEN RETURNED TO THE COMPANY IN-HOUSE COMPONENT SHOP TO DETERMINE THE CAUSE OF THE THERMAL RUN-AWAY.