Empennage is pretty much done now, getting into the wings. Apparently I still need more practice interpreting the plans... I think I'm reading too much into them.
Initially, I was having a heck of a time figuring out which holes exactly they were talking about in bold below. none of the rib to spar flange attach rivet holes appear to actually be in line with nut plate attach rivet holes. But then when I read step 3 it seems like it's saying to CS all the holes anyway, so maybe the comment in step 2 is more to make sure you don't miss them as they are hidden in the row of nut plate holes. But if that's the case, then I don't understand why they qualified the statement with "inboard of the most outboard fuel tank attach nut plate" if you're going to do them in step 3 anyway.
Initially, I was having a heck of a time figuring out which holes exactly they were talking about in bold below. none of the rib to spar flange attach rivet holes appear to actually be in line with nut plate attach rivet holes. But then when I read step 3 it seems like it's saying to CS all the holes anyway, so maybe the comment in step 2 is more to make sure you don't miss them as they are hidden in the row of nut plate holes. But if that's the case, then I don't understand why they qualified the statement with "inboard of the most outboard fuel tank attach nut plate" if you're going to do them in step 3 anyway.
Step 2: Machine Countersink the nutplate attach rivet holes in the flanges of the W-SPAR ASSY-L Spar Assembly - Left. 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.
Step 3: Machine Countersink the skin and rib attach rivet holes in the flanges of the W-SPAR ASSY-L Spar Assembly - Left. Countersink just deep enough to fit the dimples in the wing skins. Make a dimple test sample by drilling and dimpling a scrap of .032 aluminum for an AN426AD3 rivet. See Section 5E.