Section 28 Fwd Fuse Ribs, Bulkheads & Bottom Skin
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Page 28-14
Step 1: Rivet the bottom flange of the Aft Center Section Bulkhead Assembly to the F-1076 Center Skin and F-1072 Fwd Fuse Skin. See Page 28-212, Figure 2 for rivet callouts.
Back riveted by having sliding the fuse to the edge of the table to access rivets from the bottom and having someone hold the bucking bar from underneath
Step 2: Rivet the open holes in the aft ends of the F-1048 Fwd Fuselage Ribs and F-1084A-L & R Systems Brackets to the F-1072 Fwd Fuse Bottom Skin. See Page 28-12, Figure 2 for rivet callouts.
Step 3: Rivet the bottom flange of the Fwd Center Section Bulkhead Assembly to the F-1076 Center Button Skin and F-1072 Fwd Fuse Bottom Skin. See Page 28-12, Figure 2 for rivet callouts.
Step 4: Cleco the F-1004K-L & R Center Section Side Plates to the Fwd and Aft Center Section Bulkhead Assemblies. Cleco the center section side plates to the F-1072 Fwd Fuse Bottom Skin. See Page 28-9, Figure 1.
Note that the forward flange of the center section side plates are FORWARD of the F-1043A-l & R Fwd Fuselage Bulkheads as shown on Page 28-4, Figure 2.
Step 5:Cleco the F-1042-L & R Bulkhead Side Channels to the F-1004K-L & R Center Section Side Plates and F-1043A-L & R Fwd Fuselage Bulkheads as shown in Figure 1 and Page 28-4, Figure 2.
Step 6: Bolt the F-1043B-L & R Fwd Fuselage Bulkheads to the F-10423C-L & R Attach Angles,
Inbd Fwd Seat Rail Supports,
Outbd Fwd Seat Rail Supports,
F-1042-L & R Bulkhead Side Channels as shown in Figure 1.
Step 7: Bolt the F-1033-L Control Column Mount to the F-1043A-L and F-1043-B-L Fwd Fuselage Bulkheads as shown in Figure 1.
Step 8: Bolt the F-1033-R Control Column Mount to the F-1043A-R and F-1043-B-R Fwd Fuselage Bulkheads as shown in Figure 1.
Step 9: Blind Rivet the F-1043A-L Fwd Fuselage Bulkhead, forward flange of the F-1004K-L Center Section Side Plate, and F-1042-L Bulkhead Side Channel as shown in Figure 1.
Blind Rivet the F-1043A-R Fwd Fuselage Bulkhead, forward flange of the F-1004K-R Center Section Side Plate, and F-1042-R Bulkhead Side Channel as shown in Figure 1.
Step 10: Rivet the F-1043A-L Fwd Fuselage Bulkhead, forward flange of the F-1004K-L Center Section Side Plate, F-1042-L Bulkhead Side Channel, and the aft tab of the F-1049C-L Fwd Fuselage Floor Rib as shown in Figure 1. See Page 28-6, Figure 1.
Rivet the F-1043A-R Fwd Fuselage Bulkhead, forward flange of the F-1004K-R Center Section Side Plate, F-1042-R Bulkhead Side Channel, and the aft tab of the F-1049C-R Fwd Fuselage Floor Rib as shown in Figure 1. See Page 28-6, Figure 1.
Step 11: Rivet the forward flange of the F-1004K-L Center Section Side Plate, and F-1042-L Bulkhead Side Channel as shown in Figure 1.
Rivet the forward flange of the F-1004K-R Center Section Side Plate, and F-1042-R Bulkhead Side Channel as shown in Figure 1.
Step 12: Fabricate two F-1067C Seat Floor Angles from AA-063 X 3/4 X 3/4 as shown in Figure 2.
Draw a "centerline" on each seat floor angle as shown in Figure 2. The "centerlines" are drawn on the outside surface, parallel to the edges of the parts.
Step 13: Final-Drill #19 all the holes in the F-1067B Seat Floor Covers as shown in Figure 3.
Deburr the holes and edges of the seat floor covers.
Page 28-15
Step 1: Break apart the F-1076A Seat Floors and F-1067D Seat Floor Attach Strips.
File off remnants of the "Bridges" from the edges of each part and deburr all the edges of the seat floors and seat floor attach strips.
Final-Drill #19 all the screw holes in the seat floor attach strip.
Step 2: Cleco one of the F-1067D Seat Floor Attach Strips to one of the F-1067A Seat Floors as shown in Figure 2. Cleco the remaining seat floor attach strip to the remaining seat floor in a "right-side configuration.
Final-Drill #40 the holes common between the seat floors and seat floor attach strips.
Cleco one of the F-1067C Seat Floor Angles to the "left" seat floor as shown in Figure 2. Cleco the remaining seat floor angle to the "right" seat floor.
Align the centerlines drawn on the seat floor angles with the holes punched in the seat floors and match-drill #40 the seat floor angles using the holes in the seat floors as a drill guide.
Step 3: Final-Drill #40 all the nutplate attach holes in the F-1076A Seat Floors and F-1067D Seat Floor Attach Strips.
Machine counter sink the nutplate attach holes in the seat floors that are common to the seat floor attach strips to fit the head of an AN426AD3 rivet. See Figure 3.
Step 4: Uncleco F-1067C Seat Floor Angles and F1067D Seat Floor Attach Strips from the F-1076A Seat Floors.
Deburr the holes and edges of the seat floors, seat angles, and seat floor attach strips.
Prime the seat floor angles. Prime the seat floors, seat floor attach strips, and F-1067B Seat Floor Covers if/as desired.
Step 5: Rivet the F-1067C Seat Floor Angles and F-1067D Seat Floor Attach Strips to the F-1076A Seat Floor as shown in Figure 3.
Rivet nutplates to the seat floors and seat floor attach strips as shown in Figure 3.
The two subassemblies created in this step will subsequently be referred to as Seat Floor Assembly-Left and Seat Floor Assembly-Right.
Step 6: The Seat Floor Assembly-Left Seat Floor Assembly-Right and F-1067B Seat Floor Covers will not be installed at this time.
