As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRANKSHAFT NR 1 BOTTOM BLADE BUSHING, LOCATED APPROXIMATELY .100 OFFSET ON ITS HORIZONTAL PLAIN WHICH ALLOWED COUNTERWEIGHT WHEN ASSEMBLED TO CRANKSHAFT BLADE TO CONTACT INSIDE EDGE OF COUNTERWEIGHT CAUSING DAMAGE TO INSIDE EDGE OF COUNTERWEIGHT.