What was found
DURING BASIC CHECK, INSPECTION DISCOVERED CORROSION ON THE AFT CABIN LT AFT SEAT TRACK AT FRAME 84, LBL 12. REQUESTED & RECEIVED RELIEF IN THE FORM OF ETD2015-170-050134 WHICH PROVIDES A PERMANENT REPAIR BY INSTALLING A DOUBLER. ENGINEERING HAS CLASSIFIED THIS REPAIR AS A MAJOR REPAIR. EO E175-53MR-181.1 WILL BE ISSUED TO ACCOMPLISH SUPPLEMENTAL FOLLOW UP INSPECTIONS. INSPECTION INSTRUCTIONS, TASK 53-23-005-0001 INTERNAL GVI, THRESHOLD OF 20,000 FC OR 26,600 FH & INTERVAL OF 5,099FC OR 6,781FH, IS SUFFICIENT & IS MET USING THE INSPECTION REQUIREMENTS. MPG & MRBR REVISION 10. THRESHOLD IS COUNTED SINCE NEW. ACCOMPLISHMENT OF THIS REPAIR IS ON EO E175-53MR-181 UNDER WO 1914413.