What was found
(CAN) MID-AIR TURNBACK DUE TO ODOR IN CABIN. ON ARRIVAL, TOILETS, GALLEYS AND PASS UNITS CHECKED. TAIL SECTION AND AIR CONDITIONING PACKS, OVERHEAD CEILING CHECKED AND WHEEL WELLS AND CARGO COMPTS. FOUND RE-CIRCULATING FAN IN AFT CARGO SEIZED. DE-ACTIVATED PER MEL.