What was found
FUME EVENT DURING DESCENT AROUND 14,000 FT, STRONG DIRTY SOCK ODOR IN COCKPIT AND CABIN. NR 2 PACK OFF STOPPED ODOR. PERFORMED AMM 21-00-00-615-002-A, AND FOUND THE NR 2 ENGINE DEOILER SEAL LEAKING OIL. REMOVED AND REPLACED THE SEAL IAW AMM 72-60-29. LEAK CHECKED GOOD. INSPECTED THE NR 2 ENGINE BLEED DUCT, FOUND NO SIGNS OF OIL, OR ANY CONTAMINATION IAW AMM 36-11-49. LEAK CHECKED GOOD. INSPECTED APU BLEED DUCT IAW AMM 49-11-11. FOUND NO CONTAMINATION. LEAK CHECKED GOOD. ACCOMPLISHED ECS IAW AMM 21-00-00-615-002. NO ODOR PRESENT.