What was found
SEA - FLT 570 - PRIOR TO DEPARTURE, CREW REPORTED ODOR AND FUMES IN CABIN. FOUND AUXILIARY HYDRAULIC PUMP LEAKING. REPLACED AUXILIARY HYDRAULIC PUMP, REPLACED RECIRCULATION FAN FILTER, CLEANED LOWER FUSELAGE AND ACCOMPLISHED PNEUMATIC DUCT BURN-OUT PROCEDURE. OPERATED AIR CONDITIONING SYSTEM AND NO ODOR NOTED. PART TC: 9,569. (X)