As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE BACK DRILLIG NEW INTERCOSTALS ON PAX DOOR FOUND INTERCOSTAL AT DD2 FS320-338 TO BE MISSLOCATED (C-CHECK RO 11/04/2021) A NEW PART WAS REPLACED IAW CRJ900 SRM 51-42-06-00-A01 AND 51-42-21-001-001-A01 WITH REFERENCE TO DWG #601R31702 REV-N SEE CONTINUE CARD FOR PERTINENT DETAILS / C/W TASK CARD 51-900-1002-SKY