As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY STR 21R HAS MULTIPLE AREAS OF CORROSION BETWEEN FS280.00 AND FS333.00 (C-CHECK RO 6/22/2021) REPLACED STGR 21R BETWEEN FS280.00 AND FS333.00. REF REO 690-53-21-1363 REV -- DATED 2021-05-01. DWG SH670-31630 REV K, CRJ900 SRM 51-42-06-001-001-A01, AND CRJ900 SRM 51-42-21-001-001-A01. COMPLIED WITH TASK CARD 51-900-1002-SKY. PRESSURIZATION LEAL CHECK GOOD.