Patent ID: 8380386

Claim:
A testing device for checking the operability of a nose wheel steering control unit in an aircraft, wherein the nose wheel steering control unit has a plurality of input ports and a plurality of output ports, wherein at least one of the input ports of the nose wheel steering control unit is connectable to a speed sensor, which provides a signal representing the actual speed of the nose wheel of the aircraft, and wherein the nose wheel steering control unit outputs a blocking signal to be transmitted to a steering mechanism as soon as the detected actual speed of the nose wheel exceeds a predetermined nose wheel speed value, the testing device comprising: a connection interface to be connected to at least one input port of the nose wheel steering control unit and a nose wheel speed simulating unit for generating a nose wheel speed simulation signal which represents a particular simulated nose wheel speed value exceeding the predetermined speed value, wherein the generated nose wheel speed simulation signal is transmitted to the nose wheel steering control unit via the connection interface and wherein the output of the nose wheel steering control unit in response to the received nose wheel speed simulation signal is monitored.