As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON FRAME P/N SH670-31891-3 AT FS.319.70 BETWEEN STGR 18L & STGR 21L (C-CHECK) RO 5/10/2020 REMOVED AND INSTALLED NEW FRAME AT FS 319.70 BETWEEN STGR 18L AND STGR 21L. REF CRJ-900 SRM AND BOMBARDIER DWG. COMPLIED WITH SKYWEST TASK CARD. SEE CONTINUATION CARD FOR DETAILS., CHECKS OKAY