As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING INSPECTION, METAL PARTICLES WERE FOUND IN THE OIL SCREEN AND FILTER. A COMPRESSION CHECK REVEALED LOW COMPRESSION ON NR 1 CYLINDER. FURTHER INVESTIGATION FOUND A CRACKED PISTON RING, DAMAGED PISTON AND A SCORED CYLINDER WALL.