What was found
LT WING UPPER SKIN CRACK 1" STA XRS 74.000 S-9. PERFORMED MAJOR REPAIR IAW SRM 57-2-1- FIG 17 PG 87-88. REMOVED FASTENERS IAW SRM 51-1-20D. CUT OUT DAMAGED SECTION IAW SRM 57-2-1 FIG 17 PG 87-88. PERFORMED NDT INSP IAW DC8 NDT SPM PART 06-10-01-001. NEITHER CRACK NOR CORROSION FOUND AFTER CUT OUT. ENCLOSED SMN FORM 242-2. FABRICATED REPAIR DOUBLER (AL7075T6 0.0160") AND FILLER PLUG (AL7075T6 0.200") IAW SRM 57-2-1 FIG 17 PG 87-88, SRM 57-3-3 FIG 12 ITEM "A". TAPERED REPAIR DOUBLER FROM 0.160" TO 0.080" IAW SRM 57-2-1 FIG 17 PG 87-88, SRM 51-10-0 PG 22 FIG 1. CLEANED AND APPLIED POLYURETHANE TOP YELLOW COATING TO AREA AND REPAIR PARTS IAW SRM 51-1-12 PG 7. INSTALLED REPAIR PARTS IAW SRM 57-2-1 FIG 17 PG 87-88, SRM 51-1-11, SRM 51-1-120D, SRM 51-3-1 (TORQUE), HEAT TREATED FROM 7075T651 TO 7075T6 IAW SRM 51-1-1 PG 1, 13, 17. REFER TO JC BZ5L28317 FOR FUEL LEAK CHECK.