As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR INTERCOSTAL P/N: 601R318093-1 FOUND CORRODED AROUND NUT PLATE HOLES. (C-CHECK) RO 4/23/2020 REMOVED AND REPLACED WITH NEW PAX DOOR INTERCOSTAL PN: 601R318093-1 REF CRJ-900 SRM AND BOMBARDIER DWG SKY WEST TASK CARD (CL600-2D24) STRUCTURAL MAJOR REPAIR COMPLIED WITH. COMPLIED WITH SKYWEST FORM M-337.