What was found
PILOT SMELLED ODOR AND SAW SMOKE FROM INSTRUMENT PANEL. PILOT RETURNED TO KODIAK AIRPORT WITHOUT INCIDENT AND MADE A NORMAL LANDING. ON INVESTIGATION, IT WAS FOUND THE RIGHT ENGINE ALTERNATOR VOLTAGE REGULATOR HAD CAUSED AN OVERVOLTAGE SITUATION AND THE SMOKE WAS CAUSED BY THE BATTERY BEING OVERCHARGED. A NEW REGULATOR WAS INSTALLED. THE OVERVOLTAGE ALSO CAUSED SEVERAL ENGINE INDICATING INSTRUMENTS TO BE REPLACED. AFTER REPAIRS, THE AIRCRAFT WAS RETURNED TO SERVICE.