As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRAME AT FS319, AT APROX. STGR21L HAS CORROSION ON THE AFT SIDE. (C-CHECK) RO 2/05/2020 REMOVED DAMAGED AND INSTALLED NEW FRAME AT FS 319 BETWEEN STGR 21L AND 18L REF CRJ 700 SRM AND BOMBARDIER DWG. PRESSURE LEAK CHECK GOOD. COMPLIED WITH THE TASK.