As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING INSPECTON FINE METAL METAL (STEEL) PARTICLES WERE FOUND IN THE OIL FILTER. FURTHER INSPECTION REVEALED THE NR1 AND NR5 CYLINDERS EXHAUST VALVE LIFTERS WERE FOUND WORN ON THE LIFTER FACES. THE ENGINE WILL BE RETURNED TO CONTINENTAL TO DETERMINE THE CAUSE OF THE FAILURE.