What was found
DURING BASIC CHECK, INSPECTION DISCOVERED CORROSION DAMAGE ON THE AFT CABIN SEAT TRACK, PN 170-21055-001. REF ATTACHED FIGURES 1 & 2 IDENTIFYING DAMAGE LOCATION & DIMENSIONS OF 1.20 INCHES X .45 INCH TO A MAXIMUM DEPTH OF .030 INCH DEEP. PERMANENT REPAIR BY REPLACEMENT IS IAW DWGS LISTED IN TABLE 2 & SRM CHAPTER 51 PRINCIPLES. SINCE THE PARTS ARE BEING REPLACED WITH LIKE PARTS, NO CHANGES TO THE INSPECTIONS IN THE EXISTING MX PROGRAM ARE REQUIRED. ENGINEERING HAS CLASSIFIED THIS REPAIR AS A MAJOR REPAIR. ACCOMPLISHMENT OF THIS MAJOR REPAIR WAS ON EO E175-53MR-245 UNDER WO 2036955.