Hello, we have serious finding when we did the inspection on B737NG wing front spar – it is corrosion under fuel boost pumps bonding jumpers. You can discover the corrosion by cracked paint and swollen surface around the bonding jumper connection. Also cracks in the sealant are an indication of corrosion underneath. What work is needed for example: Removal of the boostpumps, rework of the corroded area, tank-entry, replacement of the bonding-jumpers brackets, bonding jumper protection against corrosion etc. UPDATE: I have a picture when repair has been done – boeing directed us to made a doubler over damaged area. Doubler has been attached to the wing front spar web by several Hi-locks as wieved on the last picture. A total repair time of several days is not abnormal. More info from enclosed pictures. Thanks to Josef for his input.