Cleco the F-1046-R Middle Fuselage Longeron, F-1034B Seal Back Brace, F-1034C-R Fuselage Bulkhead and F-1034E Seat Back Brace Gusset together. Temporarily clamp the forward end of the middle Fuselage longerons to the F-1005E-L and -R Gussets. Final-Drill #30 all holes common between the parts.
Final-Drill #19 the screw holes in the lower flange of the F-1015C-L and -R Middle Cabin Decks. Machine countersink these holes for the head of a #8 screw.
Cleco the F-1015C-R Middle Cabin Deck to the F-1015B-R Foot Well Rib Intercostal and F-1005C-R Bulkhead Side Channel as shown in Figure 1. Cleco the F-1013-L Forward Fuselage Longeron to the middle cabin deck. Final-Drill #40 the holes common between all F-1013-L parts clecoed together in this step. Repeat this step for the left side of the aircraft. The right is a mirror of the left.