As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ENGINE HAD TO BE FEATHERED IN FLIGHT DUE TO LOW OIL PRESSURE AND OIL QUANTITY DRIPPING. AFTER LANDING, A TECHNICIAN FOUND THAT THE PRE-OILING PLUG LOOSEN.HE REINSTALLED THE PLUG, FILL THE OIL TANK, PERFORMED AN ENGINE RUN AND RETURN THE AIRCRAFT TO SERVICE.