Front Bellcrank  Push Rod to 
Idler Lever 
Push Rod to 
Left Stick 
Adjustable Aileron Stop 
Rigging 
Pin Hole 
Torque Tube Assy 
Rigging 
Pin Hole 
Control Stick Mounting Block 

Figure 1: Aileron Controls in the Fuselage
Page 2 Doc # 6.02.01 09 Jan 2003 Rev. 4
27-10-00
Flight Controls
AMM

2. Description
The DA 40 has a control stick for each pilot for the aileron and elevator controls. Aileron push-rods connect to the bottom of the control sticks. The push-rods connect to the aileron front bellcrank at the control bulkhead. The front bellcrank at the control bulkhead connects to a short push-rod under the center console.
The push-rod under the center console connects to an idler lever attached to the front main bulkhead. A push-rod connects the idler lever to the rear aileron bellcrank on the rear face of the rear main bulkhead.
The rear bellcrank connects to the two push-rods in the center section. Each rod connects to a long push-rod in the wing.
Each long push-rod has three push-rod guides. The first push-rod guide attaches to the root rib. The second attaches to the flap-control rib. A small rib holds the third push-rod guide. The two long push-rods connect to the two aileron bellcranks, one in each wing.
Short push-rods connect the aileron bellcranks to the aileron horns. You can adjust the short push-rods to move the range up or down.
The aileron stop which limits the stick movement to the right side (right aileron up, left aileron down) is located left of the pilot's control stick (refer to Figure 1). The aileron stop which limits the stick movement to the left side (left aileron up, right aileron down) is located right of the co-pilot's control stick. Each aileron stop consists of a nut which is welded to the torque tube assembly, a bolt which is held by that nut, and a jam-nut which secures the bolt.
Additional, non-adjustable stops are located in front of the leading edge of the LH and RH aileron. Each stop consists of a GFRP block with rubber coating, bonded to the inside of the upper wing skin. When the aileron is deflected fully downward, the aileron paddle is deflected fully upward and contacts the stop.
Doc # 6.02.01 Page 3
Rev. 4 09 Jan 2003

27-10-00
AMM
AIRCRAFT
Push Rod to
Right Wing

Rigging Pin Hole
Push Rod to Wing Root RibLeft Wing
Aileron Bellcrank 2
Guide Rollers Guide Rollers
Flap Control Rib
Guide Rollers
Support Bracket Aileron
Rigging Pin Hole
Aileron Horn
Aileron Control Rib
LEFT SYSTEM SHOWN,

Left Aileron Bellcrank RIGHT SYSTEM OPPOSITE
Figure 2: Aileron Controls in the Wings
Page 4 Doc # 6.02.01 09 Jan 2003 Rev. 4
27-10-00
Flight Controls
AMM

3. Operation
If you move the control sticks to the left: ) The push-rods connected to the stick move to the right. ) The front bellcrank moves the push-rod below the center console to the rear. ) The push-rod below the center console moves the idler lever and second short push-rod to the rear. ) The second short push-rod moves the rear bellcrank so that the long push-rods in the wing move to the left. ) The left aileron bellcrank in the left wing moves the short push-rod attached to the left aileron horn to the rear. ) The left aileron moves up. ) The push-rod in the right wing also moves to the left. It pulls the aileron bellcrank in the wing which moves the push-rod attached to the right aileron horn forward. ) The right aileron moves down. If you move the control sticks to the right: ) The left aileron moves down. ) The right aileron moves up.
　
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