As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION NOTED ON ATTACHING ANGLES (3 EA.) COMMON TO SERVICE DOOR THRESHOLD BRACKETS AND SILL ANGLE AT FS321, FS329 AND FS338. (C-CHECK RO 7/28/2021) REMOVED AND REPLACED 3 EA. ATTACHING ANGLES P/N SH670-31982-1 COMMON TO SERVICE DOOR THRESHOLD BRACKETS AND SILL ANGLE AT FS321, FS329 AND FS338. REF. CRJ900 SRM 51-42-06-001-001-A01