As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*RH FLOOR SILL FWD OF SRVC DOOR BETWEEN FS 280.00 €“ FS 310.00 IS CORRODED (MARKED) (C-CHECK) RO 5/10/2020 EVALUATED CORROSION ON THE RIGHT-HAND FLOOR SILL FORWARD OF SERVICE DOOR BETWEEN FS 280.00 AND FS 310.00 AS OUT-OF-LIMITS. REF. CRJ900 SRM. REPLACED SILL REF. CRJ900 SRM, BOMBARDIER DWG. RESTORED FINISH. NO LEAKS DETECTED. COMPLIED WITH SKYWEST TASK CARD.