What was found
FUME EVENT DURING CLIMBOUT , TAXI , AND DURING DESCENT. DURING CLIMBOUT RAN CHECKLIST TURNED PACK # 1 OFF SMELL WENT AWAY. DURING DESCENT SMELL CAME BACK AT 3200 FEET TURNED BOTH PACKS OFF AFTER RERUNNING CHECKLIST. DURING TAXI IN SMELL CAME BACK AFTER TROUBLE SHOOTING. DESCRIPTION OF ODOR/FUMES: TEMPORARY, MUSTY DRY/DIRTY SOCKS SMELL. APPARENT CABIN SOURCE: CABIN AIR SUPPLY VENTS. FLIGHT DECK. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.-REF TSM 71-00-00-810-847A PERFORMED CAT A STEPS 3A (2) 3A(3) AND STEPS 4A(1) THROUGH 4A(4) AND STEP 4A (6) NO FUMES NOTED,OIL LEVEL OK AND NO EVIDENCE OF OIL WETTING. DURING ENGINE RUN GOT INTERMITTENT DIRTY SOCK SMELL ON APU BLEED. INSPECTED APU IAW AMM 49-00-00 FOUND OIL LEAKING INTO APU INTAKE PER MOC AND AS PRECAUTIONARY PREFORMED LVL A DECONTAMINATION W/ ENGINES IAW AMM 21-00-00