What was found
LT WING UPPER SKIN CRACKED 1" S-9 AT STA XRS 74.000 (MAJOR REPAIR). PERFORMED MAJOR REPAIR ON LT WING UPPER SKIN STA XRS 74.000 S-9 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 INSPECTION IAW DC8 NDT SPM PART 06-10-01-001. NO CRACK OR CORROSION FOUND AFTER CUT OUT, ENCLOSED SMN FORM 242-2. FABRICATED REPAIR DOUBLER (AL7075T6 0.160") AND FILLER PLUG (AL7075T6 0.190") IAW SRM 57-2-1 FIG 17 PG 87-88. TAPERED DOUBLER FROM 0.160" TO 0.080" IAW SRM 51-10-0 FIG 1 SHEET 20. CLEANED, TREATED AND PRIMED AREA AND REPAIR PARTS IAW SRM 51-1-8B. APPLIED SEALANT TO FAYING SURFACES IAW SRM 51-1-12. INSTALLED REPAIR PARTS IAW