What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH THE PERMANENT REPAIR OF CORROSION DAMAGE TO THE CROSSBEAM FRAME 17, UPPER FLANGE LOCATED BETWEEN Y=15 & Y=42.7, OTBD OF TRACK Y=11. REFERENCE ETD2015-170-073605B & FIGURES 1 & 2. THE APPROX DAMAGE DIMENSIONS ARE AS FOLLOWS, 27.50 INCHES X .90 INCH WITH 100% EXFOLIATION. VT-SAA REQUESTED & RECEIVED A REPAIR IN THE FORM OF ETD2015-170-073605B FOR THE ACCOMPLISHMENT OF THE REPAIR ANGLE APPROVAL. BECAUSE THE FLOOR CROSSBEAM FRAME 17 IS PSE & FCS, ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR.L FOLLOW UP INSPECTIONS WILL BE ACCOMPLISHED ON EO E175-53MR-205.1 IAW ANAC DER FORM ATTACHED. REF TASK 53-10-027-0001, INTERNAL GVI THRESHOLD OF 25,202 FC, INTERVAL OF 25,202FC IS SUFFICIENT & IS MET USING THE INSPECTION REQUIREMENTS, MPG & MRBR REVISION 10. THRESHOLD IS COUNTED SINCE NEW. ACCOMPLISHMENT OF THIS MAJOR REPAIR WAS ON EO E175-53MR-205 UNDER WO 1943967.