As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HIGH OIL CONSUMPTION REPORTED. BORESCOPE INSPECTION REVEALED PISTON DAMAGE. CYLINDER REMOVED AND FOUND PISTON CRACKED AND SEPARATED IN HALF. INSPECTION OF ENGINE INTERIOR REVEALED SUSPICIOUS PISTON ON OPPOSING CYLINDER. REMOVED CYLINDER AND FOUND CRACK FORMING IN CONTINENTAL TCM PN 530348 PISTON STARTING FROM BOTTOM OF SKIRT