What was found
DURING THE ACCOMPLISHMENT OF THE B4 BASIC CHECK, INSPECTION DISCOVERED DENT DAMAGE TO A PREVIOUSLY INSTALLED REPAIR DOUBLER LOCATED, BETWEEN FRAME 21 & 22, STRINGER 13L & 16L. THE DENT DAMAGE MEASURES 10.50 INCHES X 4.0 INCHES TO A MAX DEPTH OF .090 INCH DEEP. ALSO REPORTED TWO EACH DENTS ADJACENT TO THE REPAIR DOUBLER MEASURING 2.60 INCHES X 1.20 INCHES TO A MAX DEPTH OF .012 INCH DEEP & 2.20 INCHES X 1.40 INCHES TO A MAX DEPTH OF .016 INCH DEEP. THE REPAIR DOUBLER WAS INSTALLED ON EO E175-53MR-051 UNDER DISPOSITION ETD2010-170-08975. VT-SAA REMOVED THE DAMAGED REPAIR DOUBLER FOR DAMAGE MAPPING & EVALUATION. REQUESTED & RECEIVED A PERMANENT REPAIR IN THE FORM OF ETD2016-170-011418A. ENGINEERING HAS CLASSIFIED THIS REPAIR AS A MAJOR REPAIR. EO E175-53MR-051.1 REMAINS THE SAME FOR THE ACCOMPLISHMENT OF THE SUPPLEMENTAL FOLLOW UP INSPECTIONS REQUIRED BY ETD2016-170-011418A & ETD2010-170-08975. REF TASK 53-10-015-0002, EXTERNAL DET, THRESHOLD OF 26,129FC INTERVAL OF 9,750FC OR THRESHOLD OF 34,751FH INTERVAL OF 12,967FH, WHICHEVER OCCURS FIRST, IS SUFFICIENT & IS MET USING THE INSPECTION REQUIREMENTS, MPG & MRBR REVISION 11. THRESHOLD IS COUNTED SINCE NEW. ACCOMPLISHMENT OF THIS MAJOR REPAIR WAS ON EO E175-53MR-051.2 UNDER WO 2021319.