What was found
MUSTY ODOR DURING DESCENT, REMOVED AND REPLACED THE NR 1 PACK OZONE FILTER IAW AMM 21-51-41 PB 401, NO LEAKS NOTED. REMOVED AND REPLACED THE NR 2 PACK OZONE FILTER IAW AMM 21-51-41 PB401, LEAK CHECKED SATISFACTORY. ACCOMPLISHED TSM 71-00-00-810-801-A. FOUND OIL ACCUMULATION AT THE DEOILER EXHAUST DUCTS. REMOVED & REPLACED THE DEOILER MATING RING ASSY IAW AMM 76-60-29 PB 401, IDLE LEAK CHECKED SATISFACTORY. PERFORMED ECS DECONTAMINATION IAW AMM 21-00-00-615-004-A. NO FURTHER ODORS NOTED.