Section 28, FWD FUSELAGE RIBS, BHDS, BOTTOM SKINS … Page 28-4 Step 1, after looking a Figure 1 I marked-off and drilled a #12 hole as specified then carefully marked the area that is to be removed on both F-1033-R/L Control Colum Mounts. Step 2, then bolted the F-1043B-L Forward Bulkhead top the F-1042-L Bulkhead Side Channel also bolted the Outboard Forward Seat Rail Support to the Left side the Bulkhead. And bolt the F-1043C-L Attach Angle and F-1043D-L Cover Panel to the Forward Bulkhead and finally bolt the F-1004K-L Center Section Side Plate to the Bulkhead Side Channel using the following hardware AN3-5A and 4A bolts, AN960-10 washers and AN365-1032 nuts. Then clecoed the F-1043A-L Forward Fuselage Bulkhead to the center section side plate. Step 3, repeat for the Right Side. Step 4, Final drilled all #30 holes in common between-1042-L Bulkhead Side Channel and the F-1004K-Center Section Side Plate. Then Final Drilled all other #30 and #19 holes in common between the bolted and cleoed assemblies. Repeated the above step for the Right Side. Time about 5 hours.