What was found
FLT#673, BOS-AUA. ' ODOR EVENT COMING THROUGH 14,000 FEET TO THE GROUND. REFER TO THE ODOR EVENT WORKSHEET FOR MORE DETAILS; REFER TO LOGPAGE 3725746, ITEM 2 (FOUND APU LEAKING OIL FROM THE COOLING FAN AND THE APU OIL COOLER CONTAMINATED. REMOVED AND REPLACED APU OIL COOLING FAN REF A321 AMM 49-52-51. REF LP 3725747 FOR OIL COOLER REMOVED AND REPLACED. NO LEAKS NOTED THIS CLEARS MDDR. MX-4 UPDATED. PLACARD REMOVED AND MCC NOTIFIED ), AND MDDR# 508794 - BOTH PACKS WERE PLACED ON MEL DUE TO AN ODOR EVENT.