As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY LT LATCH-PIN INTERCOSTAL CORRODED BETWEEN FS 349.00 AND FS 364.00. C-CHECK RO 10/9/2020. REMOVED AND REPLACED MAIN AVIONICS BAY LT LATCH-PIN INTERCOSTAL, 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.