What was found
FILIFORM CORROSION AND ALUMINUM OXIDE ON THE UPPER SURFACE OF THE INBOARD FLANGE OF THE LOWER SILL OF THE AFT BAGGAGE DOOR FRAME WHERE THE FLOORBOARD OUTBOARD EDGE ATTACHES, BETWEEN FS1000 AND FS1047. (C-CHECK RO 4/20/2021) REMOVED AND REPLACED CORRODED LOWER SILL OF AFT CARGO DOOR IAW CRJ700 SRM 51-40-11, 51-21-06, 51-42-06, 51-42-21, 51-42-13, 51-25-06, 51-25-16 AND BOMBARDIER DWG #MM670-35670.