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 UNDER AFT OVERWING EMERGENCY EXIT DOOR BETWEEN FS 761.85 €“ FS 785.15 (MARKED) (C-CHECK) RO 5/10/2020 REMOVED CORROSION FOR RH FLOOR SILL UNDER AFT OVERWING EMERGINCY EXIT DOOR BETWEEN FS 761.85 TO FS 785.15 (AS MARKED) PER REFERENCE CRJ 900 SRM. FOUND TO BE WITHIN LIMITS PER BOMBARDIER REO.