As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C CHECK INSPECTION, FOUND CLOSURE RIB WEB WITH CHAFING OUT OF LIMITS AT LT WING INBOARD AILERON. DAMAGED AREA WAS REPAIRED IAW EWO 767-57-033 AND BOEING SERVICE REQUEST 1-773827820. FAA FORM 8100-9 WAS ISSUED APPROVING THIS REPAIR.