As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) RIGHT WING INBOARD RIB CORRODED IN THE AREA BETWEEN THE FRONT AND REAR SPARS. FOLLOWING REMOVAL OF THE RIB A SMALL AMOUNT OF INTERGRANULAR/FILIFORM CORROSION WAS FOUND ON THE REAR SPAR WEB UNDER THE STAINLESS STEEL SHIMS LOCATED BETWEEN THE RIB REAR FLANGE AND THE REAR SPAR RIB.