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RANS S-21 OUTBOUND
4.
Rivet the frame together using the appropriate rivets.
NOTE: Do NOT rivet the Elevator Horn Ribs to the aft spar. These holes
are shared with the trim tab hinge.
5.
Drill the mounting holes in the servo ribs to #11 and install the nut plates. Refer to
Elevator Trim Tab Assembly.
6.
Cleco the trailing edge skins to the trailing edge ribs only.
7.
Cleco the top skins and splice to the frame assembly. They overlap the trailing
edge skins. Use plenty of clecos in the center section to give the elevator some
rigidity.
1.
Lay out the trim tab parts on a table in their approximate locations and use the
PARTS MANUAL DRAWING to gain proper orientation. The long flange of the
spars and the long side of the skin are the top of the trim tab.
NOTE: The left half of the trim tab will have 2 more ribs than the right and
will have the PPT horns riveted to the additional ribs.
2.
The outer (4) rib flanges point inwards. On the ribs at the horn and the ribs at the
center of the trim tab, the flanges point away from each other. Rivet the ribs to
the spar.
3.
Cleco the skin and trim tab horns to the spar/ribs. Place on a flat surface with the
top side up. Check for twist and straightness and fixture or weight as needed.
Transfer drill the holes in the top part of the skin to the spar and ribs.
4.
Rivet the skin and horns to the spar/ribs. Do not rivet the (3) areas where the
hinges attach.
1.
Flip the elevator assembly over and rest the top skin on a couple boards. Place
the boards so that they can be used as a support/straight edge to assist with trim
tab fit up.
2.
Place the trim tab in place on the elevator. Line the trailing edges up and center
the trim tab between the aft trailing edges of the elevator.
3.
Cut the trim tab hinge into (3) 5.5" strips.
NOTE: Remove Hinge Pin material before cutting. The hinge pins will be
cut long as a means to secure as shown in FIGURE 05-02.
4.
Cut the hinge pins to length (6.25") and reinsert them into the hinges.
TEXT MANUAL
ELEVATOR TRIM TAB ASSEMBLY
TRIM TAB INSTALLATION
51
09/11/2018
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