What was found
AIRCRAFT WAS GROUNDED: SMOKE EVENT, INITIALLY SMELLED SMOKE, THEN CHANGED TO MUSTY ODOR, VISUALLY IN COCKPIT, THEN SMELL THROUGHOUT CABIN AND HAZE WAS SEEN THROUGHOUT THE CABIN FOLLOWED BY #1 ENGINE OIL FILTER CLOG ECAM MESSAGE. REPLACED #1 ENGINE AND ACCOMPLISHED A SATISFACTORY LEAK AND OPERATIONAL CHECK PER TASK CARD 26L40071004** (CLOSED)