As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REAR SPINNER BULKHEAD CRACKED ALL THE WAY AROUND AT RADIUS OF BACKPLATE AND ATTACHING HUB. SUSPECT CAUSE IS INSUFFICIENT SHIMMING AT FRONT BULKHEAD ALLOWING NOSE OF SPINNER TO WOBBLE AND STRESS BACKPLATE. SEARCH OF AIRCRAFT RECORDS LISTS TWO PREVIOUS FAILURES AT 681.5 HOURS AND 1,125.6 HOURS. AIRCRAFT TOTAL TIME 1,218.7 HOURS.