What was found
DURING ROUTINE C CHECK INSPECTION, FOUND RIGHT WING UPPER SKIN CRACKED AT STATION XRS 74.869 STRINGER 9. REMOVED FASTENERS AS NEEDED TO PERFORM REPAIR. REMOVED DAMAGED AREA. FABRICATED NEW SKIN, AND FILLER PLUG. PERFORMED NDT INSPECTION. NO CRACK AND NO CORROSION. TAPERED EXTERNAL DOUBLER FROM 0.160 INCH TO 0.080 INCH. CLEANED, TREATED, PRIMED AREA AND EXTERNAL DOUBLER. INSTALLED NEW FASTENERS AND REPAIR PARTS IAW DC8 SRM 57-2-1 FIGURE 17, DC8 SRM 51-1-20D, SRM 57-3-2 FIGURE 13, DC8 NDT SPM PART 08, DC8 SRM 51-10-0 FIGURE 1 SHEET 20, DC8 SRM 51-1-8B, IAW DC8 SRM 51-1-12, AND SRM 51-3-1.