As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)#1 ENGINE WAS SHUTDOWN BECAUSE OF LOW OIL PRESSURE. POST FLIGHT INSPECTION FOUND THE ENGINE SOAKED WITH OIL. THE PROP SEAL WAS REPLACED, BUT THE PROBLEM WAS NOT CURED. FURTHER INVESTIGATION FOUND AN OIL LEAK AT THE FRONT INLET CASE CO VER DUE TO A PINCHED/CUT "OIL" RING.