As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A ROUTINE INSPECTION, THE OIL FILTER WAS CUT OPEN AND EXAMINED FOR METAL CONTAMINATION AS PER MAINTENANCE INSTRUCTIONS. IT WAS FOUND THAT THE FILTRATION MEDIUM HAD COLLAPSED. THE ENGINE WAS EXAMINED FOR POSSIBLE RESTRICTIONS OF OIL FLOW AT THE BYPASS VALVE LOCATED IN THE ADAPTER PLATE. NO SUCH EVIDENCE WAS FOUND. THE VENDOR HAS BEEN CONTACTED WHO IN TURN NOTIFIED THE MANUFACTURER.