As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION, THE VERTICAL STEM OF THE LOWER REAR SPAR CAP AFT ANGLE - RH OF THE REAR SPAR ASSEMBLY WAS FOUND TO BE CORRODED AT ABOUT CWS 325 WITH .078" REMAINING THICKNESS ON THE WEB STEM FLANGE. REPAIR DEFINITION WAS RECEIVED FROM CESSNA ENGINEERING TO REPAIR CORRODED AREA BY BLENDING / ALODINE TREATMENT / PRIMER APPLICATION. REPLACEMENT OF RIVETS WERE NECESSARY UPON REASSEMBLY WITH NEW RIVETS.\ IN THE AREA