As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM DWI TO NSY, WHEN THE FLIGHT CREW OPERATED THE CENTER RECIRCULATION FAN, AN ODOR WAS SENSED IN THE COCKPIT. THE FLIGHT CREW SECURED THE FAN AND THE ODOR SUBSIDED. THE FLIGHT CONTINUED TO NSY FOR AN UNEVENTFUL LANDING. A COMPANY REPERSENTATIVE INSPECTED THE FAN WHICH WAS FOUND DEFECTIVE. THE FAN WAS PLACED ON DEFERRAL. THE AIRCRAFT WAS RETURNED TO SERVICE.