As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND WITH DOUBLE HOLE ANGLE P/N: CC670-34153-4 AT BL 33.00, FS 280.00. (C-CHECK RO 2/16/2022) REMOVED AND REPLACED STIFFENER AT FS280 RBL33.00 REF. CRJ-900 SRM, 51-42-06-001-001-A01 AND DWG CC670-34010 REV-K. COMPLIED WITH TASK CARD 51-900-1002-SKY.