Countersunk #40 holes in top and side of R F-887 upper longeron. Countersunk #30 holes in side web of L & R F-887 longerons. Dimpled and countersunk aft most holes of F-822 floor panel for flush rivet on bottom side. Dimpled countersunk #40 holes in F870E-1 stiffeners and F-870B-1 outboard stiffener.
