What was found
FLT 1448, LAS-JFK. VERY STRONG STENCH OF THE DIRTY SOCK SMELL. F/A & CUSTOMER COMPLAINED OF THE SMELL. THIS OCCURRED BETWEEN 6000 DOWN TO 2000 FT THEN THE SMELL DISSIPATED; DURING INITIAL INSP OF APU AREAS, FOUND LIGHT WETNESS AT DRAIN TUBE. RAN APU FOR 5 MINS AND NOTICED OIL AT DRAIN TUBE. FOLLOWED LINE TO FCU AND LOSE MODULE SUSPECT LOSE MODULE TO BE AT FAULT IAW AMM 49-00-00-200-811-AC SUBTASK 49-00-00-790. PERFORMED ECS SYSTEM DECONTAMINATION AND BURN IAW AMM TASK 21-00-00-615-802-A ODOR CHECK GOOD