What was found
SHIP 3223 MUSTY/PLASTIC SMELL COMING FROM GASPERS IN COCKPIT ON FINAL/TAXI IN. CORRECTIVE ACTION: FILLED OUT SMOKE AND FUMES REPORT. C/W NO GO ODI PER A320 ATA 2172. C/W W/C # 0550-2002 AND W/C # 4900-2001. COMFIRMED APU HAS AN INTERNAL OIL LEAK AND SOURCE OF CONTAMINATION. CONTACTED MCC AND PERFORMED ECS DECONTAMINATION IAW A320 W/C 2100-2005. RECIRC FILTERS REPLACED AND SMELL NO LONGER PRESENT. A/C OK FOR SVC. APU DEFERRED. (9185180)