What was found
THE PILOT REPORTED THAT ON APPROACH, THEY TURNED ON THE INSTRUMENT PANEL LIGHTS. SHORTLY AFTER TURNING THE PANEL LIGHTS ON, THEY SMELLED AN ELECTRICAL BURNING SMELL AND NOTICED A SMALL AMOUNT OF SMOKE COMING OUT OF THE RT RHEOSTAT. THEY IMMEDIATELY TURNED THE LIGHTS OFF, PULLED ALL LIGHT BREAKERS ASSOCIATED WITH INTERIOR LIGHTING AND THE SMOKE STOPPED. LANDED WITHOUT INCIDENT. MX INSPECTED THE SWITCH WITH NO DAMAGE NOTED. A SMALL AMOUNT OF LINT WAS CLEANED FROM THE SWITCH. THE UNIT THEN WAS OPERATIONALLY TESTED FOR SEVERAL MINUTES AND WAS FOUND TO BE SATISFACTORY.