What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH A PERMANENT REPAIR OF CORROSION DAMAGE DISCOVERED DURING BASIC CHECK AT EAMS ON THE AFT CABIN LH FLOOR BEAM (P/N 170-65669-003) AT FR87 IN THE AFT CABIN FLOOR STRUCTURE. THE BEAM WILL BE REPAIRED BY BLENDOUT AND DOUBLER INSTALLATION PER SRM PART II 53-23-10 REPAIR 01P. THE LH SEAT TRACK BEAM IS NOT CLASSIFIED AS FATIGUE CRITICAL STRUCTURE (FCS), BUT IT 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-454 IS BEING ACCOMPLISHED BY WO 2755442