09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
107
5.
Bolt Seat Bottom Frames to Seat Side Plates through the Multi-hole Tangs.
Insert washers and bearings between Multi-Hole tangs. Refer to Sliding Seat
Assembly parts manual drawing.
6.
Tighten nuts retaining Side Plates to Seat Back Frame.
7.
Countersink the Sliding Seat Rail Plates with a 120 degree countersink as per
FIGURE 09D-12
for flush rivets.
8.
With a 1/4" Quick Pin in Side Plate lower hole, pull Seat Back forward slightly
and slip Sliding Seat Rail Plate, on top of fuselage tube, between each set of
Side Plates. Release Seat Back. Position Rail Plates per
FIGURE 09D-12
.
Be
sure to center Rail Plate on fuselage tube.
HINT:
Use tape to hold in place temporarily.
9.
Remove Seat Frame assembly from fuselage. Transfer drill #30 and rivet in
place.
10.
Check Length of each Seat Back Tube and Seat Bottom Tube. All Seat Back
and Bottom Tubes must be of equal length. Trim any long tube to the length of
the shortest tube.
11.
Slip Seat Bottom Tube over 1/4
” Shear Nuts at AFT of Bottom Seat Frame.
Slightly ream inside of tube if it does not set well over the 1/4
” shear nut. Refer
to
FIGURE 09D-13
.
12.
Complete Sliding Seat Bottom Frame by placing Seat Bottom Pan on top of
Sliding Seat Bottom Frame. Refer to
FIGURE 09D-06
. Be sure side and front
bent flanges are tight against Frame. Transfer drill #30 and cleco in place the
Seat Bottom Pan and mark clearance slot location for the slider blocks. Cleco
Slider Block to lower side of Bottom Frame. Mark and trim Bottom Pan to clear
Slider Block. Refer back to
FIGURE 09D-06
for detail. Radius all sharp corners
of Bottom Pan. Rivet Bottom Pan to Bottom Frame. Remove Slider Block.
OPTIONAL HEADREST ASSEMBLY
1.
Become familiar with the Optional Headrest Assembly
PARTS MANUAL
DRAWINGs
and collect the parts shown in the drawings.
2.
Mark and drill the Headrest Frame as shown in
FIGURE 09D-24
.
HINT:
Use an Aluminum Tube or straight edge, as before, to find the
forward and aft centerlines of the Headrest Frame for the lower holes.
3.
Rivet the Washers to the inside of the Headrest Frame as shown. The Washers
will form “buttons” for the Internal Brace Tube to snap over.
4.
Measure and mark up from the lower ends of the Set Back Frame aft side. See
FIGURE 09D-25
.
HINT:
Use an Aluminum Tube or straight edge, as before, to find the
centerlines of the frame.
