What was found
SMELL AT THE CABIN -DIRTY SOCKS SMELL- AT FIRST DURING TAXI POT AND YET AGAIN DURING DESCEND-SMELL DISPITED WIHT BLEED 2/PACK 2 OFF.. ACCOMPLISHED DECONTAMIANTION OF THE ENVIROMENTAL CONTROL SYSTEM WIHT ENGINE AS PER A.M.M 21-00-00-615-003-A/21-00-00-615-004A OPS CHECK GOOD AND FOUND NO FURTHER SMELL ON PACK2. ALSO CHANGED BOTH RECIRCULATION FILTERS. DURING TROUBLESHOOTING OF DIRTY SOX SMELL FROM ITEM 01 OF LOG PAGE#2343338. IT WAS FOUND THAT APU IS LEAKING FROM MIDDLE DRAIN PIPE. ALSO APU OIL LEVEL WAS LOW AT TIME OF FINDING ( APU SYSTEM ). R&R APU IAW AMM 49-11-11. OPS AND LEAK CHECK GOOD.