What was found
DURING A C-CHECK, CORROSION FUSELAGE SKIN UNDER WING-TO-BODY FAIRINGS STA 720 D +14 STR 10 LEFT. REMOVED ANTI ICE DUCTS, HYD LINES & HARDWARE. REMOVED LT WING ROOT HARNESSES, CUT OUT DAMAGED UPPER SKIN 4.5 X 3", FABRICATED DOUBLER REPAIR 9.5 X 12", SHIM 12 X 3", FILLER 14 X 7.5" 2024T3 .071 PO 9001424 IAW B727 SRM 53-30-3 FIG 6. TREATED AND PRIMED IAW B727 SRM 51-10-2. INSTALLED DOUBLER REPAIR, INSTALLED ANTI ICE DUCTS HYD LINES AND WING TO BODY FAIRING HARDWARE. INSTALLED LT WING ROOT WIRE HARNESS.