What was found
DURING BASIC CHECK, INSPECTION DISCOVERED THE FWD SERVICE DOOR CUT OUT LOWER BEAM PN 170-03599-005 TO HAVE CORROSION DAMAGE. THE CORROSION DAMAGE IS LOCATED IN TWO LOCATIONS. THE DAMAGE CONSISTS OF THE FOLLOWING APPROX DIMENSIONS. DAMAGE 1, .90 INCH X .80 INCH TO A MAXIMUM DEPTH OF .027 INCH DEEP & DAMAGE 2, 1.20 INCHES X .30 INCH TO A MAXIMUM DEPTH OF .127 INCHES DEEP. THE PERMANENT REPAIR ACCOMPLISHMENT BY REPLACEMENT OF THE CORRODED THRESHOLD BEAM PN 170-03599-005 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-220 UNDER WO 1984126.