1. Deburred rivet holes added to rear port spar. 2. Clecoed parts 6ZU1-7,8 and channel angles 6zu1-6, plus 6w7-1 in place, using rivets in alternate holes. 3. Riveted all but end rivet hole in 6ZU1- plus 6ZU1-7,8 and 6W7-1 with #5 avex rivets, then pulled cleos, and riveted intermediate holes. 4. Riveted end hole in 6ZU1-6 with #4 avex rivet.
