As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*LH INTERCOSTAL BETWEEN FS333.0 AND 349.0 IS CORRODED AT STGR21. FLAGGED (C-CHECK) RO 5/10/2020 REMOVED AND REPLACED BACKUP SILL P/N SH670-31823-1. REMOVED AND REINSTALLED GUSSET, ANGLE AND ANGLE ATTACHMENT. REF CRJ-900 SRM AND BOMBARDIER DWG. LEAK CHECK GOOD. COMPLIED WITH SKYWEST TASK CARD. SEE CONTINUATION CARD FOR DETAILS.