As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION WAS FOUND AT MULTIPLE SITES ON THE VERTICAL STABILIZER REAR SPAR CAPS. AFTER BLENDING, THE REMAINING THICKNESS AT EACH SITE WAS MEASURED USING ULTRASOUND. ALL CORROSION DAMAGE WAS REMOVED BY BLENDING AND CESSNA ENGINEERING ISSUED A REPAIR DEFINITION AND APPROVAL FOR REMAINING THICKNESS TO REMAIN IN SERVICE. FINAL METAL TREATMENT WAS CARRIED OUT USING ALODINE, PRIMER AND TOP COAT.