What was found
DURING BASIC CHECK IN SAT, INSPECTION DISCOVERED CORROSION ON THE AFT CABIN RT AFT BEAM, PN 170-65669-004, UPPER SURFACE ON THE SUBJECT FLOORBEAM. THE DAMAGE DIMENSIONS ARE REPORTED AS FOLLOWS, 1.40 INCHES X 1.40 INCHES TO A MAX DEPTH OF .025 INCH DEEP. REQUESTED & RECEIVED RELIEF IN THE FORM OF ETD2016-170-016165 WHICH PROVIDES A PERMANENT REPAIR BY INSTALLING A REPAIR DOUBLER USING THE PRINCIPLES OF SRM PART II 53-23-10-RE 02P. ENGINEERING HAS CLASSIFIED THIS REPAIR AS A MAJOR REPAIR. EO E175-53MR-244.1 WILL BE ISSUED TO ACCOMPLISH FOLLOW UP INSPECTIONS. REF TASK 53-23-005-0001, INTERNAL GVI THRESHOLD OF 20,483FC OR 27,242FH, INTERVAL OF 10,133FC OR 13,476FH IAW ETD2016-170-016165 ANAC DER FORM ATTACHED, IS SUFFICIENT & IS MET USING THE INSPECTION REQUIREMENTS, MPG & MRBR REVISION 10. ACCOMPLISHMENT OF THIS MAJOR REPAIR WAS ON EO E175-53MR-244 UNDER WO 2029382.