What was found
DURING C-CHECK, MULTIPLE AREAS OF CORROSION FOUND ON THE INTERIOR BELLY SKIN AT FRAMES 17-19 AND STRINGERS 21L-22R. MAINTENANCE CUTOUT THE DAMAGE AREA, FABRICATED AND INSTALL A FILLER,SHIM AND A REPAIR DOUBLER IAW EC 5320-01890. ALL WORK ACCOMPLISHED AND WILL BE RELEASED AT THE END OF THE CHECK.