What was found
FT # 14, DIRTY SOCK SMELL IN FLT DECK DURING CLIMB & DECENT; INSPECTED PER INFO NOTICE 2017-TO15E. TABLE 1 FOUND APU INTERNAL LEAKING RAN BOTH ENG WITH BOTH PACK ON. NO ODOR COMING FROM EITHER PACK WHILE RUNNING BOTH ENG AT IDLE PULLED & COLLARD C/B L41 & L42 MX-4. PERFORMED APU BSI PER AMM 49-20-00-200-003A. FOUND EVIDENCE OF COKING ON DIFFUSER ALSO FOUND OIL RESIDUE ON FWD LOAD COMPRESSOR 6 O'CLOCK POSITION AND COKING ON AFT SECTION AS SEEN FROM APU INLET. APU IS SOURCE OF SMELL, PERFORMED ECS DECONTAMINATION WITH ENGINES, VERIFIED NO ODORS. A/C OK TO CONT SVC.