What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH THE PERMANENT REPAIR OF CORROSION DAMAGE TO THE CENTER FUSELAGE III FLOOR STRUCTURE RT INBD SEAT TRACK P/N 170-86082-003. ACCOMPLISHMENT OF THIS TRACK SPLICE REPAIR WILL BE PER ETD2016-170-088645D. ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR BECAUSE THE SEAT TRACK IS A PSE AND THIS EO IS RESTORING STRENGTH. EO E175-53MR-304.1 WILL BE ISSUED TO ACCOMPLISH THE FOLLOW UP INSPECTIONS IN ACCORDANCE WITH DER FORM ATTACHED. REF [TASK 53-23-005-0001 INTERNAL GVI THRESHOLD OF 20483 FC OR 27242 FH, INTERVAL OF 10133 FC OR 13476 FH IS SUFFICIENT AND IS MET USING THE INSPECTION REQUIREMENTS: MPG/MRBR REVISION NR 12. THRESHOLD IS COUNTED SINCE NEW. REV 1 IS BEING ISSUED TO CHANGE THE MATERIAL SPLICE 2 IS MADE OF TO 7475-T761 ALUMINUM SHEET. THE PERMANENT REPAIR WILL BE ACCOMPLISHED ON WO 2158787.