Rib/ step drill slip

[Jskyking]

This afternoon while step drilling the rib system holes for a SB-375 bushing/ system holes the rib slipped and created this feature or creature, depending on perspective. See link below.

*see picture in next thread.....I’m a little IT challenged


I don’t think it presents a structural issue, it’s just ugly. But, I wanted to get an expert opinion before I order a new rib, or JB weld the bushing in place and move

Lastly, is step drilling the best way going forward. I have a block under the rib to prevent creep.
Thanks
Jt

[Jskyking]

[PaulvS]

I can't claim to be an expert but my wings are complete. In my opinion you don't need to buy another rib. That hole is not in a critical location because most of the load is carried by the skins, and it doesn't look too close to any edge. So I would try cleaning it up by using the next size up bushing i.e. to fit 0.437 or 0.500 hole.
I also use a step drill and do not use backing blocks because the bit tends to self-centre, but it does need to be held perpendicular to the surface and with the piece being drilled properly supported. I think drilling into a backing block could actually make it harder to control.
Paul.

[Robin8er]

I'm also not an expert, but I too think the rib is useable.id use it on my plane.

[rv9builder]

You might ask Van's if you can rivet a doubler over the damaged hole and then drill a hole in the doubler to the correct size. One side of the doubler would probably need to be curved to match the flange around the lightening hole.

[Jskyking]

There was enough material to take my modified scotchbrite wheel on my grinder and nicely open the hole up for a snug fitted 1/2 SB.
Thanks again