As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED RIGHT MANIFOLD PRESSURE DROPPED TO 25 INCHES AND RIGHT OIL PRESSURE TO JUST ABOVE RED LINE. MAINTENANCE INSPECTED AND FOUND METAL PARTICLES IN THE OIL FILTER. THE ENGINE WAS REPLACED WITH NO FURTHER DEFECTS NOTED. FURTHER DETAILS TO BE PROVIDED UPON ENGINE TEARDOWN INVESTIGATION.