What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH THE PERMANENT REPAIR OF CORROSION DAMAGE TO THE AFT CABIN FLOOR STRUCTURE, LT AFT SEAT TRACK, PN 170-86081-005 AT FRAME 84. THE APPROXIMATE DAMAGE DIMENSIONS ARE AS FOLLOWS: .25" DIAMETER TO A MAXIMUM DEPTH OF 100 PERCENT MATERIAL LOSS AND .468" DIAMETER TO A MAXIMUM DEPTH OF 100 PERCENT MATERIAL LOSS. ACCOMPLISHMENT OF THIS PERMANENT TRACK SPLICE REPAIR WILL BE IAW ETD2016-170-058871A AND SRM PART II 53-00-10, FIGURE 205. BECAUSE THE FLOOR TRACK IS A PSE, ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR DUE TO STRENGTH RESTORATION. THIS IS NOT CLASSIFIED AS FCS AND DOES NOT REQUIRE FOLLOW UP INSPECTIONS IAW ETD2016-170-058871A. ACCOMPLISHMENT OF THIS MAJOR REPAIR WAS ON COMPASS EO E175-53MR-264, UNDER WO 2086940.