As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN ANNUAL INSPECTION, THE BOLT WAS FOUND SHEARED OFF AT THE END OF THE THREADS. THIS ACTUATOR HAS 3 OF THESE BOLTS INSTALLED. OVER THE YEARS, HAVE FOUND THIS CONDITION 4 OTHER TIMES. SUBMITTER SUGGESTED REMOVE AND MAGNAFLUX EVERY 500 HOURS AND/OR AFTER ANY HARD LANDING.