As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE NR 2 ENGINE INSTALLED ON WAS SHUTDOWN AND PROP FEATHERED DUE TO A FLUCTUATING OIL PRESSURE INDICATION ON BOTH ELECTRICAL AND DIRECT READING GAUGES. IT WAS DISCOVERED THAT THE OIL SUPPLY WAS DEPLETED DUE TO BEING VENTED THROUGH THE REAR ENGINE, ACCESSORY, CASE BREATHER. IT IS BELIEVED THAT THERE WAS AN INTERNAL OIL SCAVENGE SYS FAILURE.