What was found
ON A FLIGHT FROM EL PASO TO 5T6 THE OIL PRESSURE STARTED TO FLUCTUATE , ON INSPECTION THE OIL FILTER WAS FULL OF ALUM. WHEN THE ENGINE WAS REMOVED & DISMANTLED NR 4 CYLINDER PISTON SKIRT WAS BROKEN OFF THERE WERE NO SIGHS OF ANY PARTS OUT OF ALLIGIMENT OR STUCK PISTON PIN THE CON. ROD NOT BENT THE CYL NO SIGNS OF OVER HEAT OR SUPPER COOLED THE RINGS NORMAL WEAR.