What was found
AIRCRAFT 5004, FA'S REPORTED DIRTY FEET/SOCK ODOR ON FINAL APPROACH. PILOTS DIDN'T SMELL ANYTHING UNTIL PARKING AT GATE W/APU ON FOR 3 MINUTES BEFORE TURNING APU BLEED ON. SMELL SEEMED TO HAVE DISSAPATED AFTER A FEW MINUTES AND COMPLETELY DISSAPATED AFTER APU BLEED OFF. CORRECTIVE ACTION: FOUND OIL UNDER NO.2 ENG SPINNER. FOUND NO.2 ENG OVERSERVICED BY 2 QTS. REMOVED 2QTS OIL. PERFORMED BOROSCOPE INSP. PER AMDS CARD 7100-2018. REPLACED FAN SHAFT SEAL REF LOG 5439756. PERFORMED DUCT DECONTAMINATION PER A321 AMM 36-11. PERFORMED PACK DECONTAMINATION PER A321 AMM 21-00. (LP 5439752)