Stvafel

This is my first post on this forum. I have an itch to scratch; the default aircraft ground refueling sound effect is really annoying and I would like to modify it. I've triead grepping through my (Steam)DCSWorld folder for files with 'fuel' or 'pump' in the name, but I haven't found the particular annoying sound file that I want to replace. Do anyone of you know where it can be found?