Completed step 2 – page 22-03 - Dimpled the aft two holes and nutplate attach holes in the F-1257 Rudder Support Channels. Dimpled the corresponding holes in the F-1201B Firewall Shelf per Figure 2. Completed step 3 - Dimpled then riveted nutplates to the F-1201B Firewall Shelf and F-1257 Rudder Pedal Support Channels as shown in Figure 2. Completed step 7 - Made the F-1201L Bracket from AA6-063X3/4X3/4 per the dimensions given in Figure 3. Completed step 8 - Drew a centerline on the forward face of the F-1201L Bracket per Figure 3. Completed step 9 - Placed the F-1201L Bracket flush against the F-1217A-R Tunnel Rib and F-1201C Firewall Bottom dimples as shown in Figure 4. Aligned the centerline on the forward face of the bracket with the gascolator attach hole (Page 22-2, Figure 3) then match-drilled #40 the nutplate attach holes in the firewall bottom into the bracket. Removed the bracket and machine countersunk the nutplate attach holes in the forward face of the bracket for the dimples in the firewall bottom. Completed step 10 - Clecoed the F-1201L Bracket to the F-1201C Firewall Bottom. Match-Drilled #30 and clecoed the two holes in the inboard flange of the bracket into the F-1217A-R Tunnel Rib. Match-Drilled #12 the gascolator attach hole in the firewall bottom into the bracket per Figure 4. Completed step 11 - Deburred the F-1217A-R Tunnel Rib and F-1201L Bracket then primed the bracket. Completed step 12 - Riveted the F-1201L Bracket to the F-1217A-R Tunnel Rib and with a nutplate to the F-1201C Firewall Bottom as shown in Figure 4. Dimpled then riveted a second nutplate to the remaining gascolator attach hole on the firewall bottom inside the tunnel. Completed step 5 - Filled the tooling holes on the F-1201C Firewall Bottom with blind rivets per Figure 2. Completed step 6 - Riveted the FF-1204D Firewall Stiffener to the F-1201C Firewall Bottom per callouts in Figure 2. Completed step 4 - Put a thin layer of fuel tank sealant on the top surface of the top flange of the F-1201C Firewall Bottom.
