As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR AFT DD4 INTERCOSTAL HAS CORROSION (C-CHECK) RO 3/4/2021 REPLACED PAX DOOR AFT DD4 INTERCOSTAL PER SRM 51-42-06-001-001-A01 & BOMBARDIER DRAWING #601R31702 REV N. SEE CONTINUATION CARD FOR DETAILS. CHECKS GOOD. COMPLIED WITH TASK CARD 51-900-1002-SKY. LEAK CHECKS GOOD.