As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE QUIT ON CLIMB-OUT. PROP FEATHERED AIRCRAFT, MADE SAFE LANDING. FOUND HOLE IN CASE UNDER INTERCOOLER FROM FAILED CONNECTING ROD. PROP TURNS FREELY. ENGINE NOT TORN DOWN AT THIS DATE. SUBMITTER SUSPECTS QUILL SHAFT FAILED ALLOWING ENGINE TO OVERSPEED. WILL SUBMIT FOLLOW-UP M OR D WHEN ENGINE IS TORN DOWN.