As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A MX STOP. AN ODOR WAS FOUND IN THE ACFT. UPON FURTHER INSPECTION ODOR WAS FOUND TO BE COMING FROM THE FLY BY WIRE BATTERY THAT WAS SMOLDERING/SMOKING. THE BATTERY'S OVER HEAT LED WAS ON. THE BATTERY WAS REPLACED IAW THE AMM, OPS AND FUNCTIONAL CHECKED GOOD.