As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*CORROSION ON RH FLOOR SILL BETWEEN FS559 AND FS559+16. (C-CHECK RO 12/04/2021) REMOVED AND REPLACED RH FLOOR SILL BETWEEN FS.559-FS.559+16. REF CRJ 200 SRM 51-42-06, CRJ 200 SRM 51-42-21 AND DWG 601R31003 REV.K. ALL CHECKS GOOD. COMPLIED WITH 51-900-1003-SKY.