Deburred and dimpled F-842-1 aft bottom skin. Dimpled and countersunk all #30, #40 and #8 screw holes in L & R F-816A cockpit rails. Dimpled and countersunk #40 holes in L & R flange of F-804 center section bulkheads. Made notches for L & R F-887 upper longerons. Trimmed the aft end of L & R F-887 longerons.
