As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY FS 310.00 LOWER FRAME CORRODED BETWEEN STR 26L AND STR 26R. C-CHECK RO 10/9/2020. EVALUATED DAMAGE. FRAME FOUND TO BE OUT OF LIMITS. REMOVED AND REPLACED FS 310.00 FRAME WITH NEW SPLICE FRAME REPAIR, REF CRJ 900 SRM. COMPLIED WITH SKYWEST TASK CARD "STRUCTURAL MAJOR REPAIR" (RII). SEE CONTINUATION CARD FOR DETAILS OF WORK PERFORMED.