As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLT 301 - AFTER LANDING, LIGHT SMOKE AND FUMES WERE NOTED IN COCKPIT. DEFERRED CONTROL CABIN AIR FLOW FAN PER MEL 21-30 CONTROL ITEM NR M124377. REFERENCE MEL 21-30 CONTROL ITEM NR M124377 CONTROL CABIN AIR FLOW FAN INOPERATIVE. REMOVED AND REPLACED CONTROL CABIN AIR FLOW FAN PART NR 606850-2 IAW BOEING MM 21-22-11. OPERATIONAL CHECK GOOD. (M)