Countersunk all nutplate holes on forward and aft landing gear crossmembers. Riveted aft crossmember intercostal ribs and floor ribs to forward floor panel. Trimed flanges on cooling air ramp. Drilled, deburred, dimpled and countersunk all cooling air ramp parts. Primed cooling air ramp parts. Rivet F-867C-1 attach angle to landing gear forward crossmember. Back rivet F-867D-1 stiffener to cooling air ramp. Separated and edge finished F-802H-1 and F-802G-1 aft corner angles.
