As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OWNER REPORTED AN INCREASE IN OIL CONSUMPTION ON A SQUAK FOR ANNUAL INSPECTION. ENGINE APPEARED TO OPERATE NORMALLY ON RUN-UP. COMPRESSION CHECK REVEALED NR 2 CYLINDER AT 25 PSI. LEAKING PART RINGS. REMOVED CYLINDER AND FOUND NR 1 PISTON CROWN DAMAGE. FIFTY PERCENT OF EDGE SEEMED TO BE MELTED AWAY AND FIRST RING FLANGE BROKEN. SUSPECT MATERIAL DEFECT.