As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR AFT SIDE INTERCOSTAL DD6 ANGLE IS CORRODED BETWEEN FS 313.560 TO FS 347.250. - CORROSION FOUND TO BE ON CLEAT P/N 600-31902-269 ONLY. REMOVED AND REPLACED CLEAT P/N 600-31902-269 IAW CRJ 900 SRM 51-42-06-001-001-A01 AND 51-40-11-001-001-A01.