What was found
DURING ROUTINE OIL CHANGE, AN EXAMINATION OF THE OIL COOLER FLANGE AREA WHERE IT BOLTS ONTO THE ENGINE STUDS WAS FOUND TO BE CRACKED. THE CRACK WAS LOCATED BETWEEN THE STUDS MOUNTING AREA IN THE OIL COLLER SURFACE WELD. THIS IS THE FOURTH INSTANCE OF AN OIL COOLER CRACK FOUND AT THE OIL COOLER BY THIS STA WITHIN THE LAST YEAR. ALL PREVIOUS CRACKED COOLER HAD AT LEAST 500 HOURS TIME IN SERVICE. CLOSE EXAMINATION OF THIS AREA IS RECOMMENDED AT EACH OIL CHANGE OR COWLING REMOVAL.