What was found
* CORROSION DETECTED ON FUSELAGE FLOOR STRUCTURE AT PAX DOOR OPENING, ON FWD AND AFT DOOR HINGE CUP FITTINGS, AROUND FLOOR BOARD NUT/PLATE HOLES (MARKED). (C-CHECK) RO 4/6/2020 REMOVED CORROSION PER CRJ 700 SRM. ORIGINAL MATERIAL THICKNESS FWD CLOSING FITTING 0.140, REMAINING MATERIAL THICKNESS 0.030, MATERIAL LOSS 0.110. MAX ALLOWABLE BLEND DEPTH IS 0.014. ORIGINAL MATERIAL THICKNESS AFT CLOSING FITTING 0.140, REMAINING MATERIAL THICKNESS 0.045, MATERIAL LOSS 0.110. MAX ALLOWABLE BLEND DEPTH IS 0.014. OUT OF LIMITS PER CRJ 700 SRM. REPLACED FWD & AFT CUPS FITTING PER CRJ 700 SRM. (2 NEW CLOSING FITTINGS)