As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY FS333.00 FRAME CORRODED BETWEEN STR 26L AND STR 25R (C-CHECK RO 7/28/2021) REPLACED MAIN AVIONICS BAY FS333 FRAME BETWEEN STR 26L AND STR 25R REF DWG SH670-32420 REV. E, CRJ900 SRM 53-00-06-201-001-A03, CRJ900 SRM 51-42-06-001-001-A01. CHECKS GOOD. COMPLIED WITH 51-900-1002-SKY.