As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OVER A TWO HOUR PERIOD NR 1 ENGINE OIL QUANTITY DECREASED TO ZERO. OIL PRESSURE DROPPED TO BELOW 35 PSI AND LOW OIL PRESSURE LIGHT CAME ON. ACCOMPLISHED ENGINE SHUT DOWN. *S/D* THE OIL FILTER CAP WAS FOUND TO HAVE COME LOOSE FROM THE OIL TANK. THE OIL FILTER WAS REMOVED AND EXAMINED AS A PRECAUTION AND NO DEBRIS WAS FOUND.