As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR SILL ANGLE IS CORRODED ON IB & OB SIDE NEAR OR AT SEVERAL FASTENER HOLES AND AT LOWER FORWARD FLANGE. DOOR SILL ANGLE (KICKPLATE ANGLE) P/N SH670-31875-7 ON PAX DOOR SURROUND STRUCTURE, IAW CRJ900 SRM 51-42-06-001-001-A01 & 51-42-21-001-001-A01.