As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR AFT UPPER INTERCOSTAL CORRODED ( 3RD FROM THE TOP ) (C-CHECK RO 7/10/2021) REMOVED AND REPLACED PASSENGER DOOR AFT UPPER INTERCOSTAL IAW CRJ 700 SRM 51-42-06-001-001-A01. COMPLETED MAJOR REPAIR TASK CARD 51-900-1002-SKY AND FORM M-337, NO CHANGE TO WEIGHT.