In searching the internet for another topic, I came across the following blog post from Justin Twilbeck in 2012:
This set my senses tingling, and I slowly turned around from my computer to see F-1015A-L happily waving its joggled flange at me–from OUTSIDE the F-1004D-L channel.
Subsequently, I searched on VAF for F-1015A-L and found this gem of a post from 2010:
This is going to require some re-work, and while it shouldn’t be too bad, it brings to light a serious deficiency in the RV-10 plans. While I was working on Page 26-5, I kept thinking that something was wrong with the 1015A ribs, but I couldn’t put my finger on it. There is very little mention of them at all in the plans.
I’m hoping that by posting this and adding to the VAF thread, I can help other builders who might be running into this problem.
I noted when riveting the outer ribs to the left wing spar that Page 14-5, Figure 2 calls out for the two ribs inboard of the most outboard rib, “AN470AD4-5, 4 PLACES.” There are eight holes to be riveted here.
I believe this is an error on the part of Van’s, and it appears others have found the same error. The thought is that it was introduced after the design of the RV-14 was finalized. Here is a relevant VAF thread on the subject.
Steps 2 and 3 on Page 13-3 of the RV-10 Wing plans can be rather confusing as to which holes to countersink. The language seems to be rather precise, and if taken literally, has you looking for holes that aren’t there.
The confusing sentence in Step 2 is
“Machine countersink those rib to spar flange attach rivet holes that are in line with the nutplate attach rivet holes and are inboard of the most outboard fuel tank attach nutplate.”
It’s not a difficult sentence to parse, particularly, and the latter third is quite clear. The first half, however, indicates that there should be some (rib to spar flange attach) holes IN LINE with the nutplate rivet holes. Well, if taken literally, there are NO SUCH HOLES. There are some holes that partially fit the description, but they are not exactly in line with the nutplate rivet holes–but their centerlines are about 1/16″ of an inch aft of the nutplate rivet holes’ centerlines. To someone like me who tends to read things very literally, this sentence has the potential to introduce significant confusion and frustration.
I had read aloud and thought about these steps for FAR too long, and finally decided that someone else surely has had the same confusion. So a simple search on Van’s Air Force Forums produced this gem of a thread, which I recommend to anyone as confused as I was.
A link from that thread, provided by Mike Jimenez, contains some helpful photos.