What was found
DURING BASIC CHECK, INSPECTION DISCOVERED THE AFT PAX DOOR CUT OUT, LOWER THRESHOLD BEAM, PN 170-65703-003 TO HAVE CORROSION DAMAGE. THE CORROSION DAMAGE IS LOCATED IN MULTIPLE LOCATIONS. REF FIGURES 1 - 4 FOR DAMAGE DIMENSIONS & LOCATIONS. 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 ACCOMPLISHED ON EO E175-53MR-247 UNDER WO 2037002.