As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3669 - FOUND CREW REPORTED LEFT RECIRCULATION FAN TO BE INOPERATIVE. WHEN TURNED ON CABIN FILLED WITH SMOKE, AIRCRAFT WAS EVACUATED. MAINTENANCE REMOVED AND REPLACED LEFT RECIRCULATION FAN AND FILTER. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)