As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY STR 26L CORRODED BETWEEN FS 333.00 AND FS 364.00. C-CHECK RO 10/9/2020. REMOVED AND REPLACED MAIN AVIONICS BAY STGR 26L FROM FS 333.00 TO FS 364.00, REF CRJ900 SRM AND DWG PERFORMED PRESSURE LEAK CHECK, REF CRJ900 AMM, NO DEFECTS NOTED. SEE CONTINUE CARD FOR WORK PERFORMED. COMPLIED WITH TASK CARD.