As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THERE IS EVIDENCE OF CORROSION AT FS 319.70 FRAME BETWEEN STR 18L AND STR 21L. C-CHECK RO 10/17/2020. REMOVED AND REPLACED THE CORRODED FRAME AT FS 319.70 BETWEEN STGR 18L AND STGR 21L WITH NEW FRAME (P/N SH670-31891-3S), PER BOMBARDIER DWG AND CRJ700 SRM. ALL CHECKS GOOD. SEE CONTINUATION CARD FOR FURTHER DETAILS. SKYCARD COMPLIED WITH.