As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE IN THE CIRCUIT WITH THE LANDING LIGHT SELECTED ON, THE PILOT NOTICED SMOKE AND FUMES IN THE COCKPIT, DECLARED AN EMERGENCY AND LANDED THE AIRCRAFT. MAINTENANCE TRACED THE PROBLEM TO AN OVERHEATED LANDING LIGHT SWITCH AND REPLACED THE SWITCH.