As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AN AMBER CABIN FAN MESSAGE ON CONDITION PAGE & AN ODOR IN BACK OF ACFT. TURNED CABIN FANS OFF. R & R THE NR 2 RECIRCULATION FAN IAW AMM 21-21-51-000-001A & 400-001A. OPS & LEAK CHECKED GOOD IAW AMM 21-21-00-710-001A. A REOCCURRENCE OF THE FAULT OCCURRED BEFORE THE ACFT WAS DISPATCHED. R & R RECIRCULATION FILTER, OPS CHECKED NORMAL.