As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) FOLLOWING REMOVAL OF THE LT WING THE UPPER SKIN AND INNER RIB FLANGE WAS FOUND TO BE GROUND AWAY TO THE EXTENT THAT THE RIVET EDGE DISTANCE WAS COMPROMISED. SOME RIVETS ALSO EXHIBIT GRINDINGMARKS. THE RT WING WAS THEN REMOVED AND INSPECTED AND FOUND TO BE IN A SIMILAR CONDITION. PERSONNEL/MAINTENANCE ERROR.