As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED RIGHT ENGINE OIL PRESSURE DROPPED TO 20 PSI IN FLIGHT AND TO ZERO PSI AT IDLE ON THE GROUND. MAINTENANCE INSPECTED AND FOUND METAL PARTICLES AT THE OIL PRESSURE RELIEF VALVE, FURTHER INSPECTION FOUND THE STARTER ADAPTER NEEDLE BEARING DAMAGED. THE ENGINE IS BEING REPLACED.