As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE WAS DISASSEMBLED AFTER ENGINE FAILURE. THE CRANKSHAFT BOLT THAT HOLDS FRONT AND REAR SECTIONS TOGETHER WAS FOUND BROKEN AT THE BASE OF THE THREADS, CRANKSHAFT REAR HALF WAS ALSO BROKEN. ABOUT ONE-HALF THE RADIUS OF SPLINES WERE BROKEN OUT.