As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNDERFLOOR CORROSION. INTERCOSTAL 21L FROM FS333.00 TO FS349.00 CORRODED. (C-CHECK RO 3/11/2022) REMOVED AND INSTALLED NEW REPLACEMENT BACK UP SILL (P/N SH670-31823-1S) ONTO STGR21L BETWEEN FS333.00 AND FS349.00. REF BOMBARDIER DWG# SH670-31810 REV AE AND CRJ700 SRM 51-42-06-001-001 A01. / COMPLIED WITH SKYWEST TASKCARD 51-900-1002-SKY.