What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH THE PERMANENT REPAIR OF CORROSION DAMAGE TO THE FWD CABIN FLOOR STRUCTURE RT FWD SEAT TRACK PN 170-03263-001 AT FRAME 13. THE APPROX DAMAGE DIMENSIONS ARE AS FOLLOWS. 3.0 INCHES X 2.4 INCHES TO A MAXIMUM DEPTH OF .015 INCH DEEP. 2.40 INCHES X 2.30 INCHES TO A MAXIMUM DEPTH OF .025 INCH DEEP. .80 INCH X .61 INCH TO A MAXIMUM DEPTH OF .002 INCH DEEP. 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 & DOES NOT REQUIRE FOLLOW UP INSPECTIONS IAW ETD2015-170-042991. ACCOMPLISHMENT OF THIS REPAIR IS ON EO E175-53MR-176.