What was found
DESCENDING OUT OF 23000 FEET, DETECTED A DIRTY SOCK/BURNT OIL ODOR ALL THE WAY DOWN TO LANDING. REMOVED AND REPLACED THE CONDENSER BAG. RAN APU, NR 1 AND 2 ENGINES. OPS CHECKED GOOD. WORK PERFORMED IAW AMM 21-51-00, FOUND CONDENSER BAG TO HAVE NORMAL WEAR.