As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WINDSHIELD HEAT CONTROLLER FAILURE CAUSING OVER HEATING OF LEFT FORWARD SIDE WINDSCREEN. PILOTS REPORTED SMOKE IN THE COCKPIT FROM BUS BAR CONNECTION ON WINDOW. MAINTENANCE PERSONNEL DETERMINED SMOKING BUS BAR WAS CAUSED BY OVER VOLTAGE / AMPERAGE CONDITION OF THE FAILED WINDOW HEAT CONTROLLER