What was found
DURING BOARDING MAINTENANCE WAS NOTIFIED OF PASSENGERS COMPLAINTS OF OILY ODOR IN CABIN. FLIGHT CREW SMELLED ODOR ALSO. TURNED PACKS OFF AND ODOR DISSIPATED. NO SMOKE NOTED. COMPLY WITH NO GO ODI PREVENTION PROGRAM. FOUND SOURCE OF SMELL COMING FROM APU. FOUND EXTERNAL LEAK ON APU, SMOKE COMING FROM TAIL PIPE AND GRINDING SOUND WHEN TRYING TO START. CLEANED APU AND PERFORMED WORK CARD 2100-2005 DECONTAMINATION OF ECS WHEN APU INOPERATIVE. APU REPLACED.