What was found
DURING A "C" CHECK, LT WING UPPER SURFACE GOUGED 1 INCH AFT OF NR 2 SLAT O/B SLAT HOOK RETAINER. REMOVED PAINT AT AFFECTED AREA IAW B727 B772 51-20-1. INSPECTED AREA USING C/3 ULTRSONIC THICKNESS GOUGE ORIGINAL THICKNESS OF 0.040 MATERIAL LOSS OF 0.0102 INCH, MAT REMAINING IS 0.0298 AREA FOUND TO BE OUT OF LIMITS IAW B727 SRM 57-20-01 FIG 1. REMOVED FASTENERS FOR ACCESS IAW B727 SRM 51-30-2. CUT OUT EXISTING FILLER STRIP DIMENSION 71/2 INCH BY 1 1/2 INCH IAW B727 SRM 57-30-4 FIG 9. FAB`D REPAIR AT SLAT HOOK MAT USED 0.038 CRESS AISI 301 1/2 HAND AND PO NR 9001628 DIM 7 1/2 BY 1 1/2 DIM OF THE DOUBLER 7 1/2 BY 4 1/2 IAW B727 SRM 57-30-4 FIG 9. PRIMED AREA AND PARTS IAW B727 SRM 51-10-2. INSTALLED REPAIR I