As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED LT ENGINE HAD PARTIAL POWER, THEN NOTICED OIL COMING FORM COWLING UNDER THE TURBO. MAINTENANCE INSPECTED AND FOUND METAL CONTAMINATION IN ENGINE OIL FILTER AND THE #5 CYLINDER SHOWING SIGNS OF PRE-IGNITION. THE ENGINE IS TO BE REPLACED.