As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DD6 MID INTERCOSTAL HAS MULTIPLE AREAS OF CORROSION (C-CHECK RO 9/8/2021) REMOVED AND REPLACED CORRODED DD6 MID INTERCOSTAL WITH NEW UNIT. REF CRJ900 SRM 51-42-06-001-001-A01, CRJ900 SRM 51-42-21-001-001-A01, DWG 601R31702 REV -N. COMPLIED WITH TASK CARD 51-900-1002-SKY. OPERATIONAL TEST CHECKED GOOD, PRESSURE CHECKED GOOD. SEE CONTINUE CARD FOR DETAILS OF WORK PERFORMED