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Trouble-Shooting
1. General
The table below lists the defects you could have in the aileron control system. If you have the trouble detailed in the Trouble column read across to the Possible Cause column. Then do the repair in the Repair column.
Trouble Possible Cause Repair
Airplane moves about its longitudinal axis in flight. Aileron push-rods need adjusting. Adjust the aileron push-rods.
Aileron controls stiff/catch. Bearings defective. Control rod guides defective. Push-rod bent. Replace the defective eye-end. Replace the guides. Replace the push-rod.
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Maintenance Practices
1. General
These maintenance practices tell you how to do tests on the aileron control system. They also tell you how to adjust the aileron control system. Refer to paragraphs 4 and 5 for removal, installation and access data on the push-rods and bellcranks. Refer to Section 57-60 to remove/install the ailerons.
WARNING: WHEN YOU DO WORK ON THE AIRPLANE CONTROLS, YOU MUST
MAKE SURE THE AREA AROUND THE CONTROLS/CONTROL
SURFACES ARE CLEAR OF PERSONNEL AND EQUIPMENT. IF YOU
DO NOT DO THIS, INJURY TO PERSONNEL AND DAMAGE TO
CONTROL SURFACES CAN OCCUR.
WARNING: WHEN YOU COMPLETE WORK ON THE CONTROLS, MAKE SURE
THAT YOU REMOVE ALL LOOSE ITEMS OR TOOLS FROM THAT
AREA. LOOSE ITEMS OR TOOLS CAN PREVENT FULL MOVEMENT
OF THE AIRPLANE CONTROLS. THIS CAN CAUSE DEATH OR INJURY
TO PERSONS.
2. Aileron Control System Test for Correct Range of Movement
A. Equipment
Item Quantity Part Number
Control stick rigging pins. 2 -
Ruler. 1 Commercial.
B. Aileron Control Test Procedure
Note: Use a ruler to make all measurements at the aileron control surfaces. Make the measurement between the top surface of the aileron, and the top surface of the wing tip.
Detail Steps/Work Items Key Items/References
(1) Make a copy of the Control Surfaces Adjustment Report. Refer to Section 06-00. Use it to record the measurements.
(2) Remove the left pilot’s seat. Refer to Section 25-10.
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DA 40 Series
(3) Install the control stick rigging pins: S At the bottom of the left stick. S Through the left mounting bracket into the torque tube. Refer to Figure 1. To lock aileron movement. To lock elevator movement.
(4) Measure the distance between the trailing edge of each aileron and the trailing edge of the wing tip. Record these measurements. The left aileron must align with the right aileron.
(5) Remove the rigging pins from the following: S The bottom of each control stick. S The left stick mounting bracket.
WARNING: WHEN YOU DO WORK ON THE AIRPLANE CONTROLS, YOU MUST MAKE SURE THE AREAS AROUND THE CONTROLS/CONTROL SURFACES ARE CLEAR OF PERSONS/EQUIPMENT. IF YOU DO NOT DO THIS, INJURY TO PERSONNEL AND DAMAGE TO CONTROL SURFACES CAN OCCUR.
(6) Move the control stick fully to the left and hold it against the stop.
(7) Measure the distance between the trailing edge of the left aileron and the trailing edge of the wing tip. Record the measurement. The distance must be as shown in the Control Surfaces Adjustment Report.
(8) Measure the distance between the trailing edge of the right aileron and the trailing edge of the wing tip. Record the measurement. The distance must be as shown in the Control Surfaces Adjustment Report.
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