Pg. 21-19 Step 5: Dimpled the nutplate attach rivet holes for the F-1207B Bulkhead. Step 6: Dimpled and riveted the nutplates to the F-1207B Bulkhead. Step 7: Clecoed and riveted the F-1207B Bulkhead to the F-1206G-L&R Baggage Ribs only. Step 8: Install the snap bushings as indicated.