What was found
LT WING INBD. AILERON L/E UPPER PLATING HAS THREE CRACKS OF 0.750, 0.500, 0.500 AT STA. XA 487.000 - XA 569.000. PERFORMED MAJOR REPAIR IAW SRM 57-1-0 PG.1, SRM 57-8-1 FIG.1. REMOVED DAMAGED PLATING IAW SRM 51-1-21 PG. 1. CLEANED, TREATED AND PRIMED AREA IAW SRM 51-1-8B. FABRICATED NEW PLATING (7075-T6AL 0.040) IAW SRM 57-1-0 PG.1, SRM 57-8-1 FG.1. CLEANED, TREATED AND PRIMED NEW PLATING INTERNAL SURFACE IAW SRM 51-1-8B. INSTALLED NEW PLATING WITH NEW FASTENERS IAW SRM 51-1-21 PG.1. FOR W/B SEE NR 4049.