I was working alone and frustrated that I couldn't find someone to help me readjust out RV-12 on the saw horses in order to get an inch or two more ground clearance on one side in order to re-install the wheel. So I had this brilliant idea that I could get closer to the aft sawhorse, raise it with my back against the bulkhead in that area, and shove another rug under the aircraft on top of the sawhorse.
It worked, but just as I began to lower it, I hear a loud pop followed by the tinkling sound that a small piece of metal makes against an aluminum panel. The link I have shared (I am not permitted to upload images as attachments) shows the rivet head. It also shows an area on the bulkhead closest to the sawhorse location where four rivets are missing. I have not yet found any portions of any rivets on the floor around that area or anywhere else.
I am very worried that my utter stupidity has led to a big problem, but I also wonder if during prior inspections, I just didn't notice the missing rivets.
The bulkhead is easily accessible for inserting new rivets, and it appears the holes are nearly all lined up (the upper one looks a bit out of line). I have contacted our local EAA RV-12 guru to come take a look and advise me. I also would value the thoughts of y'all on this forum.