As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DD1 FWD INTERCOSTAL HAS VISIBLE CRACK (C-CHECK RO 9/8/2021) REMOVED AND REPLACED CRACKED DD1 INTERCOSTAL WITH NEW UNIT. REF CRJ900 SRM 51-42-06-001-001-A01 AND DWG 601R31702 REV-N. COMPLIED WITH TASK CARD 51-900-1002-SKY. PRESSURE CHECK GOOD. SEE CONTINUE CARD FOR DETAILS OF WORK PERFORMED.