What was found
DURING BASIC CHECK, INSPECTION DISCOVERED CORROSION ON THE AFT CABIN RT AFT SEAT TRACK AT FRAME 84, Y260.4. RECEIVED RELIEF IN THE FORM OF ETD 2015-170-022567 WHICH PROVIDES A PERMANENT REPAIR BY INSTALLING A DOUBLER. ENGINEERING HAS CLASSIFIED THIS REPAIR AS A MAJOR REPAIR. EO E175-53 MR-165 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 PERMANENT REPAIR IS ON E175-53 MR-163 UNDER WORK ORDER 1847490.