What was found
DURING CRUISE, DIRTY SOCK ODOR IN COCKPIT ONLY. FL 030. COMPLIED WITH THE CHECK LIST, ODOR ISOLATED. DURING DESCENT AT 6000 FT FLT IDLE, THE LEFT PACK ISOLATED (OFF) ODOR AGAIN, DONNED OXYTEN MASKS AND LANDED TURNED CABIN FANS OFF ODOR DISAPATED. IAW TSM 71-00-00-810-801-A, FOUND THE NR 1 ENGINE DEOILER SEAL LEAKING. R & R THE NR 1 ENGINE DEOILER SEAL IAW AMM 72-60-31. PERFORMED A PACK BURN OUT IAW AMM 21-00-00. RAN BOTH ENGINES IAW AMM 71-00-00. CHANGED BOTH RECIRCULATION FAN FILTERS IAW AMM 21-21-41 OPS AND LEAK CHECKED GOOD.