As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN FLIGHT ALL ENGINE OIL WAS PUMPED OVERBOARD CAUSING CATASTROPHIC ENGINE FAILURE. LOSS OF ENGINE OIL WAS DUE TO FAILURE OF THREADS ON MAGNESIUM CRANKCASE COVER ASSEMBLY. THE THREADS FAILED WHERE THE OIL FILTER ADAPTER THREADS INTO THE CRANKCASE COVER ASSEMBLY. TO PREVENT REOCCURRENCE, REMOVE THREADED TYPE CONTINENTAL OIL FILTER ASSEMBLY FROM SERVICE.