What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH THE PERMANENT REPAIR OF CORROSION DAMAGE TO THE CROSSBEAM FRAME 14 UPPER FLANGE, REF ETD2015-170-088972A & FIGURES FOR DAMAGE DIMENSIONS & LOCATIONS. BECAUSE THE FLOOR CROSSBEAM FRAME 14 IS PSE & FCS, ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR. FOLLOW UP INSPECTIONS WILL BE ACCOMPLISHED ON EO E175-53MR-213 1 IAW ANAC DER FORM ATTACHED. REF TASK 53-10-027-0001, INTERNAL GVI THRESHOLD OF 25,202 FC, INTERVAL OF 25,202 FC IS SUFFICIENT & IS MET USING THE INSPECTION REQUIREMENTS, MPG & MRBR REVISION 11. THRESHOLD IS COUNTED SINCE NEW. ACCOMPLISHMENT OF THIS MAJOR REPAIR WAS ON EO E175-53MR-213 UNDER WO 1964951.