As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW REPORTED FMS FAILED THEN FLIGHT DECK EXPERIENCED SMOKE AND FUMES. CREW ELECTED TO RETURN THE AIRCRAFT TO BASE WHERE A LANDING WAS CARRIED OUT WITHOUT INCIDENT. ENGINEERING REPLACED THE FMS UNIT. INITIAL INVESTIGATION OF THE REMOVED UNIT INDICATES AN ELECTRICAL FAILURE OF AN INTERNAL CIRCUIT BOARD. UNIT HAS BEEN RETURNED TO THE MFG FOR REPAIR AND WITH A REQUEST TO PROVIDE A STRIP REPORT. (TC NR 20070416008)