What was found
DURING BASIC CHECK, INSPECTION DISCOVERED CORROSION ON THE AFT CABIN LT AFT BEAM PN 170-65669-003 UPPER FLANGE. VT-SAA REQUESTED & RECEIVED RELIEF IN THE FORM OF ETD2015-170-050687B WHICH PROVIDES A PERMANENT REPAIR BY INSTALLING A REPAIR DOUBLER USING THE PRINCIPLES OF SRM PART II 53-23-10 REPAIR 02. THE CORROSION DAMAGE APPROX DIMENSIONS ARE 1.50 INCHES X 2.25 INCH WITH AN AREA OF 100% ORIGINAL MATERIAL LOSS IN THE DEEPEST LOCATION REF FIGURE 1. ENGINEERING HAS CLASSIFIED THIS REPAIR AS A MAJOR REPAIR. THIS REPAIR DOES NOT AFFECT FCS & DOES NOT REQUIRE FOLLOW UP INSPECTIONS IAW ETD2015-170-050687B. ACCOMPLISHMENT OF THIS MAJOR REPAIR WAS ON EO E175-53MR-178 UNDER WO 1915078.