What was found
SHIP 3251 UPON GETTING ON THE AIRPLANE, A STRANGE ODOR WAS IN THE AIRPLANE . F/A'S AND PASSENGERS COMPLAINED ABOUT ODOR, A DIRTY MUSTY SMELL. CALLED MTC AND DEPLANED. CORRECTIVE ACTION: APU OIL FILTER LEAKING. REPLACED PACKING AND CLEANED APU COMPARTMENT. REPLACED CABIN AIR FILTERS. OK FOR SERVICE. (9285472)