As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED OIL AND FILTER CHANGE ON ENGINE REFERENCED, FOUND BEARING PARTICLES WITHIN OIL FILTER. DISASSEMBLED ENGINE TO FIND FRONT MAIN BEARING EXHIBITING DELAMINATION OF THE LINER SURFACE. FAULTY MANUFACTURING OF BEARING IS SUSPECT.