As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION FOUND THAT THE EMERGENCY LIGHTS ON THE LEFT SIDE BETWEEN ROW 7 TO 11, AND THE WINDOW EXIT LIGHTS STAY ON IN THE LIGHT SWITCH OFF POSITION. THE AIRCRAFT WAS USING GROUND SERVICE POWER. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED THE NUMBER 3 BATTERY POWER SUPPLY AND THE NUMBER 3 BATTERY IAW EMB 140 AMM 33-50-04. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.