As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(PEK) DURING CRUISE, SMOKE EMITTED IN THE FLIGHT DECK. TURNED OFF ALL FANS AND SMOKE DISSIPATED. RESET LOWER RECIRCULATION FAN AND LEFT THE UPPER RECIRCULATION FANS OFF. AIRCRAFT CONTINUED TO DESTINATION AND LANDED WITHOUT INCIDENT. OPERATIONAL CHECK OF ALL FANS WAS GOOD. SYSTEM IS ON DEFERRAL FOR PRECAUTIONARY REPLACEMENT OF THE RECIRCULATION FAN AND FILTER.