Completed step 3 page 29A-02 - Dimpled the F-1201P Firewall Spacers and corresponding screw and rivet holes in the F-1201A Firewall Upper as shown in Figure 3. Dimpled the rivet hole locations in the corresponding nutplates. Clecoed the firewall spacers and nutplates to the lower flange of the firewall upper. Riveted the top rivet only as shown in Figure 3. Started on step 4 - Machine countersunk the nutplate rivet holes in the F-1201H Upper Fwd Fuse Doubler. Dimpled the screw holes in the upper fwd fuse doubler and F-1201A Firewall Upper for #8 screws. Clecoed the upper fwd fuse doubler and nutplates to the firewall upper. Started step 5 - Clamped the F-1201J and F-1201K Upper Cowl Hinges to the F-1201H Upper Fwd Fuse Doubler. Aligned the lower edge of the upper cowl hinges per the call out in Figure 3. Match-Drilled #40 and clecoed all the corresponding holes between the upper fwd fuse doubler and the upper cowl hinges. Removed and deburred the parts. Machine countersunk the rivet holes in the upper fwd fuse doubler.
