As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CATASTROPHIC ENGINE FAILURE IN CRUISE FLIGHT. PROP FEATHERED. ACFT RETURNED TO BASE ON ONE ENG. ENG CASE FOUND SHATTERED AT ACCY SECTION. CRANKSHAFT FOUND FRACTURED AT NR6 CONNECTING ROD BEARING. CAM SHAFT, ALL ROTATING COMPONENTS, AND ENGINE MOUNT DAMAGED DUE TO SUDDEN STOPPAGE. ORIGIN OF FAILURE SEQUENCE DETERMINED TO BE OLD FLAW IN NR 6 CONNECTING ROD, APPARENTLY NOT DISCOVERED BY NDT DURING LAST ENGINE OVERHAUL.