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 IAW ETD2015-170-048470 FOR DAMAGE DIMENSIONS & LOCATIONS. REQUESTED & RECEIVED RELIEF IN THE FORM OF ETD2015-170-048470A FOR THE ACCOMPLISHMENT OF THE BLEND OUTS & CROSSBEAM FRAME 14 ANGLE REPAIR APPROVAL. BECAUSE THE FLOOR CROSSBEAM FRAME 14 IS A PSE, ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR. FOLLOW UP INSPECTIONS WILL BE ACCOMPLISHED ON EO E175-53MR-184.1 IAW ANAC DER FORM ATTACHED. INTERNAL DET INTERVAL OF 9,000 FLIGHT CYCLES. THERE IS NO SPECIFIC TASK IN MPG & MRBR REVISION 10 THAT COVERS THIS REQUIREMENT. ACCOMPLISHMENT OF THIS REPAIR IS ON EO E175-53MR-184 UNDER WO 1915049.