As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH TO LANDING, PILOT REPORTED ELECTRICAL FIRE UNDER INSTRUMENT PANEL. COCKPIT FILLED WITH SMOKE AND FLAMES WERE NOTED UNDER PANEL BEHIND GLOVE BOX. PILOT WAS ABLE TO LAND THE AIRCRAFT BUT THE FIRE DESTROYED THE AIRCRAFT. THE POWER WIRE FROM THE RELAY ON THE FIREWALL WAS BURNED FROM THE RELAY TO THE POINT WHERE IT GOES THROUGH THE FIREWALL.