What was found
DURING CURRENT C-CHECK AT KLM/AMS, FOUND LEVEL 1 CORROSION ON THE L/W VERTICAL FLANGE OF THE LOWER FRONT SPAR CHORD BETWEEN ILES 630.72 AND 638 (INBOARD OF NR 2 PYLON). TAPER LOCK FASTENERS IN THE AFFECTED AREA WERE REMOVED. CORROSION BLENDED AND FASTENER HOLES WERE REAMED AND SPOT FACED TO ENSURE A STRAIGHT HOLE AND FLAT CONTACT AREA. MATERIAL LOSS MEASURED AT .150 INCH. AN OPEN HOLE HFEC, DYE CHECK AND SURFACE HFEC INSPECTION WAS PERFORMED TO INSURE NO CRACKS/CORROSION REMAINED. NO FINDINGS. AREA FLAP PEENED, ALODINED AND PRIME PAINTED. OVER-SIZED HI-LOCK FASTENERS INSTALLED WET WITH BMS 5-26 SEALANT. TANK SEALED. (M)