As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) 2 STIFFENERS WERE FOUND FWD OF THE REAR SPAR ON THE RIGHT WING, RIVETED TO SUBJECT SKIN PANEL. BOTH STIFFENERS WERE FOUND CRACKED. NO IPC REFERENCE TO THE STIFFENERS EXISTED AND THE SUBMITTER QUESTIONED CESSNA ABOUT THEM. CESSNA STATED THEY HAD BEEN INSTALLED AT THE FACTORY TO PREVENT SKIN OIL CANNING BUT THERE WAS NO DATA TO APPPROVE THEIR INSTALLATION. CESSNA REQUESTED THAT THE STIFFENERS BE REMOVED AND THE SKIN PANEL BE MONITORED FOR CRACKING.