As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT ACCIDENT IN WHICH PROPELLER SEPARATED FROM AIRCRAFT. SUSPECT CAUSE: RETAINING NUT FAILURE. SUBMITTER RECOMMENDATION: RETAINING NUT BE REPLACED AT SPECIFIC INTERVALS. RETAINING NUT BE INSPECTED PRIOR TO EACH PROPELLER INSTALLATION.