As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY STR 21L BACK-UP SILL ATTACH ANGLE COMMON TO FS349.00 CORRODED (C-CHECK RO 6/22/2021) REMOVED AND REPLACED MAIN AVIONICS BAY STR 21L BACK-UP SILL ATTACH ANGLE COMMON TO FS349.00 REF. DRWG SH670-31810 REV. AE AND CRJ 900 SRM 51-42-06-001-001-A01. COMPLIED WITH 51-900-1002-SKY