As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FINAL APPROACH, SMOKE WAS NOTICED COMING FROM BELOW THE INSTRUMENT PANEL. AFTER NORMAL LANDING AIRCRAFT WAS SECURED AND CREW EXITED. FURTHER INVESTIGATION REVEALED A BURNED ANCILLARY SERVICE UNIT CIRCUIT CARD. THE COCKPIT NIGHT LIGHTING MODE, WHICH WAS SELECTED PRIOR TO FINAL APPROACH, IS CONTROLLED THOUGH THIS CIRCUIT CARD.