The aileron valve is located on the left side of the fuselage behind and below the seat. It consists of three sections with ports. The center port supplies vacuum to the aileron valve via the manifold. The aileron valve supplies modulated vacuum to the left and right banking bellows. The rough air system also supplies banking modulation through hoses connected to the left and right side of the aileron valve’s output ports.
The rear section of the aileron valve is fixed in position and provides the output vacuum to the banking bellows. The center leaf is rotated by a control arm which is connected via linkage to the bell crank going to the rudder valve walking beam. The forward section of the aileron valve is rotated by the aileron valve control arm which is connected via linkage to the wheel or stick.
Once the valve has been removed from the trainer, it is disassembled by removing a collar near the front of the valve. The three valve sections can then be separated, cleaned, degreased, and lubricated with gun oil. As with any of the trainer’s valves, the ports need to be cleaned and checked for insect nests or other obstructions.