As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIB WAS FOUND CRACKED FROM NUTPLATE RIVET. AFTER REMOVING HINGE FITTING 86392-02, A 1.25 INCH CRACK WAS FOUND RUNNING ALONG THE BOTTOM OF THE NUTPLATE. USING A BORESCOPE, THE INBOARD NOSE RIB WAS ALSO FOUND TO HAVE A 1 INCH CRACK RUNNING THROUGH THE LOWER BOLT HOLE. ALTHOUGH NOT AS BAD, THE OTHER AILERON WAS IN THE SAME CONDITION.