As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
* CORROSION DETECTED ON AFT SIDE OF F.S. 280.00, BELOW FLOOR, ON A-BAY FLOOR BOARD SUPPORT "ANGLE" (MARKED). (C-CHECK RO 9/8/2021) REMOVED AND REPLACED FLOOR BOARD SUPPORT ANGLE AT FS280.00 REF. CRJ 900 SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01