As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ACCESS OF PAX DOOR INTERCOSTAL AT DD1A FS320-338. FOUND CHANNEL PN: 601R318274-1 TO BE CORRODED (C-CHECK RO 11/04/2021) CORROSION FOUND TO BE OUT OF LIMITS. REMOVED AND REPLACED CHANNEL WITH NEW P/N601R318274-1 IAW CRJ900 SRM 51-42-21-001-001-A01 AND DWG 601R31702 REV-N. COMPLIED WITH TASK CARD 51-900-1002-SKY.