As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND HEAVY CORROSION ON WEB FLOOR PROTECTOR ANGLES (3EA), LOCATED BETWEEN FS 319.00 TO FS 349.00. AT SERVICE DOOR SILL AREA. INSTALLED NEW SERVICEABLE WEB FLOOR PROTECTOR ANGLES 2EA (PN SH670-32040-4S) AND 1EA (PN SH670-32040-3S) IAW CRJ900 SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01.