At my last technical inspection, we discovered that I had somehow made a boo-boo with one of the rib-spar unions. I don’t know how I did it, but I somehow put the rib over the top of the par rivets instead of having the rivets holding the rib to the spar. Here’s a photo of what I mean.
As the rib flange was covering the factory heads of these rivets, I had to figure out a unique way of drilling them out. Naturally, my ever insightful old father-in-law provided some great ideas. Firstly, I drilled out the core of the rivets from the shop head side.
I then cut out a wooden wedge and used a hammer to tap it between the spar and the rib so that the flange bent up enough to expose the factory heads. Using a punch I tapped the rivets out.
In order to bend the flange back so that it was flush with the spar, we used some blocks of wood and an F-clamp.
The flange was still a touch away from the spar so I put in some clecoes to hold it flush.
I then put in some new rivets and set them using my squeezer. Can you tell which ones are the new ones?
Here is a shot of the factory head side. I’m pretty happy with how the repair turned out.
I also filed out some scratches out of the spar doubler that I had made with my squeezer when I was setting the skin to spar rivets. I dimpled the elevator trim servo cover plate as well.
Build time 2 hours.