As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) JUST AFTER LEVELING OUT PILOT NOTICED SMOKE IN THE COCKPIT/CABIN AREA. AIRCRAFT WENT TO 10000 FT, DEPRESSURIZED AND ELECTRICAL POWER WAS REMOVED. POWER WAS RESTORED AND AIRCRAFT RETURNED TO BASE WITHOUT FURTHER INCIDENT. UPON INVESTIGATION IT WAS DETERMINED THAT THE VENTILATION BLOWER BEARING SEIZED AND CAUSED THE SMOKE. VENT BLOWER WAS REPLACED AND SYSTEM TESTED SERVICEABLE.