As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FINAL APPROACH AN ELECTRICAL SMELL OCCURRED, THEN VISIBLE SMOKE STARTED COMING FROM PILOT''S SIDE PANEL NEAR OXYGEN MASK BOX. DURING GROUND INSPECTION, DISCOVERED THE FLOOR HEAT SWITCH WAS BADLY BURNED. ALSO 10-AMP CIRCUIT BREAKER (PN 2TC2-10) DID NOT OPEN. (X)