What was found
SHIP 6822"DIRTY SOCK"ODOR COMING FROM PACK AIR CONDITIONING ON TAKEOFF AND AT LOWER ALTITUDE ON LANDING. ODOR WAS STRONGER IN THE COCKPIT THAN THE CABIN. CORRECTIVE ACTION: PERFORMED TASK REMOVAL OF OIL CONTAMINATION FROM THE AIR CONDITIONING AND PNEUMATIC SYSTEMS PER B757 AMM 21-00-01. FOUND RECIRCULATION AIR FILTERS DIRTY AND REMOVED FILTER PER B757 AMM 21-25. INSTALLED NEW FILTERS PER B757 AMM 21- 25. ENGINE CHANGED DUE TO INTERNAL OIL LEAK PER WC. (9359121)