Final drilled #30 the 1/8th holes in the F-826-1 left and right center bottom skin and the F-822 fwd floor panel that are common with the holes in the fwd and aft bottom flanges of the F-804 center section assembly. Match drilled #40 the holes centered on the bottom of the F-804 center section bulkhead assembly. Clecoed the F-807B-1 F-808B-1, F-809B-1 and F-810A-1 bulkhead tops to their corresponding bulkhead sections. Clecoed the F-825-1 Aft top skin to the F-807B-1, F-808B-1, F-809B-1 and F-810A-1 bulkhead tops and the F-887 L &R-1 upper longerons. Fitted the F-819-1 aft deck to the top of the F-887-L-1 and R-1 upper longerons with the F-810D-1 spacer in place. Centered the F-819-1 aft deck and clamped it in place. Marked the position of the notches for the F-81B-1 stab attach bars. Match drilled #30 the 1/8 holes in the F-819-1 Aft sec that are common with the F-887-L-1 and R-1 upper longerons Marked the location of the aft face of the F-812 bulkhead assembly on the F-887-L-1 & R-1 longerons
final drilling the left and right center bottom skin
