What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH A PERMANENT REPAIR OF CORROSION DAMAGE DISCOVERED DURING THE B6 BASIC CHECK AT EAMS ON THE WASTE BOX SKIN DOUBLER (P/N 170-66931-001) IN THE CENTER FUSELAGE III. THE DAMAGE DEPTH EXCEEDS THE ALLOWABLE LIMITS OF SRM PART II 53-23-60/AD01. THE WASTE BOX SKIN DOUBLER WILL BE REPAIRED BY CUTOUT AND EXTERNAL DOUBLER INSTALLATION PER SRM PART II 53-23-60 REPAIR 01P. THE WASTE BOX SKIN DOUBLER IS CLASSIFIED AS PRIMARY STRUCTURE. ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR DUE TO STRENGTH RESTORATION OF PRIMARY STRUCTURE. EO E175-53MR-411 IS BEING ACCOMPLISHED BY WO 2636242