As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION, CRACKS WERE NOTED IN RADIUS OF FITTING ATTACHED TO AILERON SPAR. SUBMITTER SUSPECT CAUSE IS POOR ALIGNMENT OF AILERON ATTACH FITTINGS THROUGH FALSE SPAR AFTER C/W AD 51-21-02 OR, SIMPLY, WEAK AREA IN DESIGN OF AILERON FITTING.