As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY STR 23L CORRODED BETWEEN FS333.00 AND FS349.00 (C-CHECK RO 10/22/2021) REPLACED MAIN AVIONICS BAY STR 23L FROM FS333.00 TO FS387.00 REF DWG SH690-31350 REV. M AND CRJ900 SRM 53-00-03-201-001-A02 AND CRJ900 SRM 51-42-06-001-001-A01. COMPLIED WITH 51-900-1002-SKY. LEAK CHECK GOOD.