I drilled some holes for a plastic conduit for wing wiring today. This is corrugated plastic tubing from McMaster carr that snaps into holes drilled into the wing ribs. I will add some silicone as well to keep it from vibrating. I made a jig from a scrap of angle to get the holes in approximately the same area. They don’t have to be precise since the conduit is flexible. This would have been much easier to do before the ribs were installed.
I was unable to get through the wing walk ribs, so I will have to get a drill bit extension
