What was found
DURING FLIGHT, THE AIRCRAFT RETURN TO DEPARTURE DUE TO VENT EXTRACT FAULT, STRONG ODOR FO OIL, ELECTRICAL SMOKE IN PAX CABIN AND COCKPIT, TSM TASK 05-50-00-810-831-A WAS PERFORMED, INSPECTON OF THE CAUSE OF CABIN ODORS OR SMOKE AND WAS FOUND WITH DAMAGE E/E BAY EXTRACT FAN, IAW TSM SUBTASK 05-50-00-810-085-B WAS PERFORMED. REMOVED AND REPLACED THE EXTRACT FAN IAW AMM TASK 21-26-51-000-001-A , AMM TASK 21-26-51-400-001-A AND REPLACED RECIRCULATION FILTERS IAW AMM 21-21-41-000-001-A AND AMM 21-21-41-400-001-A, PERFORMED OPS CHECK OF THE AVIONCS EQUIPMENT VENTILATION SYSTEM AMM TASK 21-26-00-710-001-A AND OPS TEST OF THE EXTRACT FANS AMM TASK 21-26-51-710-001-A ALL TEST WAS SATISFACTORY THE AIRCRAFT RETURN TO NORMAL OPERATION.