As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*MAIN AVIONICS BAY STGR21L BACK-UP SILL FS310-333 CORRODED (C-CHECK RO 4/25/2022) REMOVED AND INSTALLED NEW MAIN AVIONICS BAY STR 21L BACK-UP SILL BETWEEN FS310.00 TO FS333.00 REF CRJ900 SRM 51-42-06-001-001-A01 AND CRJ900 SRM 51-42-21-001-001-A01 AND DWG SH 670-31810 REV AE. COMPLIED WITH TASK CARD 51-900-1002-SKY. SEE CONTINUE CARD FOR DETAILS.