Section 43  Cabin

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Page 42-3

Step 1: Fabricate two F-637B-R Right Angles and two F-637B-L Left Angles using AA6-125X3/4X3/4 and the information given in Figure 1 and 2.

Step 2: Fabricate four F-637 C Angles using AA6-063X3/4X3/4 and information given in Figure 3.

Step 3: Drill 1/8" holes into  both F637A seat Backs using the dimensions given in Figure 4.

Page 42-3

Step 1: As shown in Figure 1, align the bottom edges of the F-637-B Left and Right Angles with the bottom edge of the F-637A Seat Backs. Align the vertex of the left and right angles with the side edges of the seat backs. Clamp the parts in position, then match-drill #30 the holes along the sides of the seat backs into the left and right angles. Repeat this step with the remaining seat back and remaining left and right angles.

Step 2: Drill 1/8" holes into two of the F-637C Angles using the dimensions given in Figure 1.

Step 3: Nest one of the F-637C Angles, drilled in Step 2, under the flanges of one of the F-637A Seat Backs. The vertex of the angle will have to be filled to fit into the radius of the seat back. Align the ends of the angle with the edges of the seat back, then match-drill #30 the holes in the angle into the seat back and into the seat back notice that the end holes in the angle will be match-drilled into the tops of the F-637B Left and Right Angles).

Step 4: Remove the eyes indicated in Figure 3 and 4 from the F-10103-R Right Upper Seat Hinge Half and the F-1013B-L Left Upper Seat Hinge Half. These are the hinge halves that were set aside on Page 33-2, Step 5

Step 5: Make the Right Seat Back Assembly by aligning the bottom edge of one of the F-637A Seat Backs with the F-10103B-R Right Upper Seat Hinge Half and one of the remaining the F-637C Angles

Clamp the parts in position, then match-drill #30 the holes shown in Figure 3 into the right upper seat hinge half and the angle.

Page 42-4

Step 1: Remove the parts from the Seat Back Assemblies and deburr all the holes.

Step 2: Dimple the holes in the F-637A Seat Back (flush on the back side)

Machine countersink the corresponding holes in the F-637B Angles for four flush rivets.

Step 3: Prime the parts if/as desired, then reassemble the Left and Right Seat Back Assemblies. Rivet them using the rivets called-out in Figure 1.

Step 4: Place the Left and Right Seat Back Assemblies into position on the F-10103A Lower Seat Hinge Halves as shown in Figure 2.

Step 5: Locate the two hinge pins set aside on Page 33-2, Step 5,

Step 6 Secure both Seat Back Assemblies with the pins.