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 FS319.70 AND FS333.00 (C CHECK RO 12-31-21) REPLACED MAIN AVIONICS BAY STR 23L FROM FS319.7-FS333 REF DWG SH670-31630 REV. K, CRJ900 SRM 51-42-06-001-001-A01, AND CRJ900 SRM 51-42-21-001-001-A01. COMPLIED WITH 51-900-1002-SKY. LEAK CHECK GOOD.