Completed step 3 page 21-19 for right side floor - Riveted the F-1213-R Step Floors to the F-1202F Bulkhead, the F-1212-L & -R Step Ribs, and the F-1203A Bulkhead using the rivets called out in Figure 2. Made sure to capture the two holes in the front flange of the F-1253-R Seat Floor Support when riveting the two outbd holes of the step floor to the bulkhead. Completed step 4 - Dimpled the nutplates shown in Figure 2, then reached through the lightening holes in the F-1212-L & -R Step Ribs and riveted the nutplates to the top flange of the F-1202F Bulkhead and to the F-1213-L & -R Step Floors using the rivets called out. Had to use a wire to pull the rivets into place so they could be clecoed as my hand would not fit through the lightening holes. Installed the six systems block studs in the holes of the F-1276 Bottom Skin between the two inboard F-1215 Seat Ribs with MS32520-248 screws and MS21042-08 nuts. Will have to wait to tighten the screws and nuts as it requires two people to hold the screw and another to tighten the nut due to the distance of reach.
