What was found
DURING C-CHECK DISCREPANCY AS FOLLOWS, LT WING FRONT SPAR VERTICAL STIFFENER HAS TWO CRACKS AT LOWER TWO RIVETS AT LEADING EDGE STA 90. REMOVED FASTENER AT LT WING FRONT SPAR VERTICAL STIFFENER CUT OUT DAMAGE AREA DIM APPROX 2.375 BY 2.4375 INCH IAW B-727 SRM 51-40-1 FIG 1. PART MADE FROM 7075 T-6 .050 PO 9912380 C FILLER 1 INCH DIM APPROX 2.375 BY 2.4375 INCH AND DOUBLER 8.875 INCH BY 2.625 INCH IAW B-727 SRM 57-10-2 FIG 3 AND 51-40-9 FIG 1. PART BAC METAL TREATED WITH ALODINE AND PRIMER IAW B-727 SRM 51-10-2. INSTALLED ANGLE REPAIR IAW B-727 SRM 51-30-2.