Manufactured rear seat air vent bracket. Match drilled, deburred, dimpled, and countersunk L & R F-851 forward bottom skins and F-850-1 bottom skins. Rolled aft edge of F-850 skin. Countersunk #40 holes in F-802-K1 landing gear forward cross member and F-802L-1 landing gear aft cross member. Edge finished L & R F-861PP landing gear cover plates. Rolled outboard edge of cover plates. Drilled, deburred and countersunk cover plates for #6 screws. Dimpled #40 holes in lower firewall.