As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 8 RIB, LT WING SIDE BRACE LOCATION HAD CRACK THAT PROPAGATED THE FULL UPPER AREA OF THE SIDE BRACE. THE FORWARD ATTACH BOLT WAS MISSING AND EVIDENCE OF SPINNING ON THE SURFACE OF THE RIB. AFT BOLT WAS HELD BY 2 THREADS. INSPECTED AREA AT ANNUAL.