As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE ENGINE OIL PRESSURE DECREASED AND THE PILOT SHUT THE ENGINE DOWN IN FLIGHT. THE FLIGHT DIVERTED TO POINT OF ORIGIN. SUBSEQUENT INSPECTION REVEALED DEBRIS IN THE ENGINE OIL FILTER AND MAIN CHIP DETECTOR. P&WC WILL INVESTIGATE THE EVENT AND WILL ADVISE OF ROOT CAUSE, ONCE DETERMINED.