As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUE TO SLOWLY PROGRESSING OIL CONSUMPTION RATE, PULLED THE NR 1 CYLINDER AND DISCOVERED THE NR 2 CONNECTING ROD CAP WAS LIGHTLY SCRAPING THE BOTTOM PISTON PIN BOSS AREA OF THE NR 1 PISTON. INVESTIGATION REVEALED THE NR 1 CONNECTING ROD BEARING HAD BROKEN.