As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF DURING FLIGHT, PILOT REPORTED AN UNUSUAL & LOW OIL PRESS ALARM. ENG WAS SHUTDOWN & ACFT RETURNED BACK TO AIRPORT UNEVENTFULLY. GND INSPECTION FOUND THE TMM CHIP DETECTOR CONTAMINATED & THE LP IMPELLER RUBBING. THE PROPELLER WAS ROTATING FREE.