As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROXIMATELY 15 MINUTES AFTER TAKEOFF, THE NR 4 PISTON SEPARATED FROM ITS CONNECTING ROD. THIS CAUSED THE NR 4 CYLINDER TO FRACTURE RESULTING IN A COMPLETE LOSS OF OIL. THE ENGINE STALLED FORCING AN EMERGENCY LANDING ON A RIVER BANK. UPON LANDING, THE LEFT MAIN GEAR COLLAPSED WHICH FORCED THE AIRCRAFT INTO TREES LINING THE BANK. AIRCRAFT SUFFERED SUBSTANTIAL DAMAGE. PILOT WAS UNINJURED.