As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR INTERCOSTAL 3ND FROM HINGE ON FWD SIDE AT DD5 P/N 601R318091-5 IS CORRODED - LOCATED & DRILLED NEW INTERCOSTAL P/N 601R318091-5 IAW CRJ900 SRM 51-40-11-001-001-A01, INSTALLED NEW INTERCOSTAL IAW CRJ900 SRM 51-42-06-001-001-A01 REV 38 07-25-20