As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT WING-BODY FAIRING SUPPORT STRUCTURE AT FS 939 HAS SUSPECTED CORROSION AROUND THE NUTPLATES AT THE CENTERLINE. C-CHECK RO 11/16/2020. REMOVED CORROSION, AFTER EVALUATION STRUCTURE SUPPORT WAS FOUND OUT OF LIMITS. RECEIVED AND INSTALLED NEW STRUCTURE SUPPORT NUTPLATE ANGLE, PER CRJ 700 SRM.