What was found
THERE IS A DEFINITE MYSTY SMELL IN THE FLIGHT DECK IT WAS NOTICED UPON GETTING IN FLIGHT DECK. C/A: CLEANED AND INSPECTED APU FOUND APU COOLING FAN DUCTS WET WITH OIL. R/R FAN ASSY AND CLEANED DUCTS PER A320 AMM 49-52 DURING LEAK CHECK FOUND OIL SEEPING FROM CASE INSIDE THE PLENUM AND GOING INTO COMPRESSOR. WILL REQUIRE APU CHANGE. MCC NOTIFED. ( 417446) REPLACED APU IAW FORECAST 32-0549-8-0062 CW NO GO ODI PREVENTION ON MD LOG 0197698 ECS DECONTAMINATION CW. (LP: 4885688)