What was found
* THE SERVICE DOOR SURROUND FUSELAGE SIDE AFT EDGE MEMBER/SILL FROM FS349.00 TO FS364.00 IS CORRODED. (C-CHECK) RO 2/14/2020 BLENDED OUT CORROSION ON R/H FLOOR SILL AFT OF SERVICE DOOR FROM FS349.00 TO FS364.00, REF: CRJ-900 SRM. EVALUATION OF BLENDED AREAS ON R/H FLOOR SILL AFT OF SERVICE DOOR FROM FS349.00 TO FS364.00, ORIGINAL THICKNESS .050", MATERIAL LOSS.050", REMAINING THICKNESS .000", MATERIAL IS OUT OF LIMITS REF: CRJ-900 SRM, 100% LOSS OF MATERIAL. FABRICATED REPAIR PARTS AND REPAIRED REF.BOMBARDIER REO AND DWG. PERFORMED OPERATIONAL TEST OF THE ATC MODE S TRANSPONDER. REF CRJ-900 AMM. OP TEST GOOD. COMPLIED WITH A PRESSURIZATION LEAK CHECK OF THE REPAIR AREA. REF. CRJ900 AMM. NO LEAKS NOTED.