Landing Flaps Drive System

outboard left-hand actuator

The actuator is driven by the flexible shaft (red) from the inboard left-hand actuator. The rotation of the actuator input shaft is converted by a worm gear, increasing the torque. and changing the direction by 90°. The worm gear drives the ball screw spindle (grey). The spindle nut (blue) is connected to the flap panel.

At the outer side of the actuator is the electronic position device. This device is at both outer actuators and can detect an asymmetric movement of the flap panels, which would be a malfunction. In this case the supervising electronic circuit shuts down the motor immediately.

outboard left-hand actuator (Landing Flaps Drive System)
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