As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LWS - FLIGHT 2027 - WHILE BOARDING PASSENGERS WITH GROUND POWER ON, SMOKE STARTED TO COME FROM THE TRIM INDICATOR PANEL IN THE COCKPIT. POWER TURNED OFF AND BATTERIES TURNED OFF. SMOKE STOPPED. NO INDICATION OF FIRE. FOUND CIRCUIT BREAKER POPPED. MAINTENANCE REPLACED THE RUDDER TRIM PANEL. OPERATIONAL CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.