What was found
DURING BASIC CHECK, INSPECTION DISCOVERED THE FWD FUSELAGE L1 PAX DOOR THRESHOLD BEAM, PN 170-03719-005, TO HAVE CORROSION DAMAGE. THE CORROSION DAMAGE IS LOCATED IN TWO LOCATIONS. THE DAMAGE CONSISTS OF THE FOLLOWING APPROX DIMENSIONS. DAMAGE 1, 1.20 INCHES X .90 INCHES TO A MAX DEPTH OF .035 INCH DEEP & DAMAGE 2, 1.0 INCH X .60 INCHES TO A MAX DEPTH OF .038 INCH DEEP. THE PERMANENT REPAIR ACCOMPLISHMENT BY REPLACEMENT OF THE CORRODED THRESHOLD BEAM WILL BE ACCOMPLISHED IAW ORIGINAL PRODUCTION DWGS & SRM STANDARD PRACTICES. ENGINEERING HAS CLASSIFIED THIS REPAIR AS A MAJOR REPAIR. ACCOMPLISHMENT OF THIS MAJOR REPAIR WAS ON EO E175-53MR-225 UNDER WO 1996601.