As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GRU - PILOT REPORTED APPROXIMATELY ONE HOUR INTO FLIGHT RECIRCULATION FAN STATUS MESSAGE ILLUMINATED AND FLIGHT ATTENDANTS REPORTED SMOKE AND FUMES IN CABIN. TURNED OFF RECIRC FANS PER SMOKE AND FUMES PROCEDURE AND SMOKE DISSIPATED. FLIGHT LANDED GRU WITHOUT INCIDENT. REPLACED UPPER FORWARD RECIRCULATION FAN. SYSTEM GROUND CHECK NORMAL OPERATION.