As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RIGHT AILERON CONTROL BOLT AT THE BELLCRANK HAD A MISSING NUT. THE NUT WAS LOCATED IN THE WING AND WAS CRACKED IN THREE PLACES. ONE CRACK WAS ACTUALLY SEPARATED AND ALLOWED THE NUT TO FALL OFF. ALL HARDWARE WAS REPLACED WITH CORRECT HARDWARE.