As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PROPELLER REMOVAL, FOUND CRACKS AT EACH BOLT HOLE. BULKHEAD WAS INSTALLED WITH NEW A-4227-1 SHOULDER WASHERS AT INITIAL INSTALLATION 498.1 HOURS PRIOR. SUSPECT CRACKS DUE TO POOR MANUFACTURING. SUBMITTER SUGGESTS THIS REPAIR STATION HAS REPLACED MANY BULKHEADS WITH CRACKS AT VERY LOW TIMES.