As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) A CHIP LIGHT INDICATION CAME ON DURING FLIGHT. UPON LANDING, THE ENGINE PROPELLER WENT INTO UNCOMMANDED FEATHER AND WOULD NOT COME OUT OF FEATHER. POST FLIGHT INSPECTIONS FOUND THE ENGINE PROPELLER WAS STIFF TO TURN AND THE OIL FILTER SHOWED A LOT OF SILVERY COLOUR MATERIAL.