09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
68
9.
Begin by putting a couple clecos in various wing ribs to line up the skin and then
in the tank supports. Use an ice pick or similar tool to line up the holes.
10.
Begin placing a few clecos in place next to the rear spar. Note the locations of
any interference between the bottom skin and the hinge arms. If necessary,
remove the skin and widen the slots until the skin does
NOT
rub on the hinge
arms.
NOTE:
This clearance varies with twist in the wing so ensure any twist is
removed before checking for interference.
11.
Cleco the rest of the bottom skin to the wing leaving about 3 rows at the front.
12.
Use an edge forming tool to roll a slight edge on the leading edge of the skin to
prevent pillowing.
13.
Cleco the remaining rows of the bottom skin to the ribs.
14.
Insert and cleco the wing tank supports (KPWI0651) to the bottom skin. The tank
supports overlap onto the wing ribs and go on the inside of the ribs flange.
15.
Double check to be sure there is 0° of twist in the wing.
16.
Match drill the leading edge holes through the D spar using a #30 drill. Start in
the middle and work your way out.
17.
Remove the front 4 or so rows of clecos.
18.
Debur the skin and the Forward Spar.
19.
Dimple the leading edge holes in the skin using 120° dimple dies.
20.
Countersink and then debur the holes in the Forward Spar.
21.
Insert clecos to secure the front of the bottom skin.
22.
Use the appropriate rivets to rivet the bottom skin to the wing. Start at the leading
edge and work your way rearward. Stop about 4 rows from the trailing edge.
NOTE:
Do
NOT
rivet the Inside Root Rib at this time.
23.
Double check to be sure there is 0° of twist in the wing.
24.
Match drill the trailing edge holes in the skin to the rear spar using a #30 drill.
Start in the middle and work your way out. Lightly lift the edge to clear any burrs
or chips.
25.
Finish riveting the bottom skin to the wing.
NOTE:
Do
NOT
rivet the Inside Root Rib at this time.
26.
Rivet the inspection tab rings that are clecoed to the bottom skin.