How is the Landing Gear Steering and Control Unit (LGSCU) primarily engaged?

The Landing Gear Steering and Control Unit (LGSCU) is primarily engaged through hydraulic pressure control. In the operation of aircraft landing gear systems, hydraulic mechanisms are commonly utilized due to their reliability and efficiency in managing the complex movements required during landing and takeoff.

The hydraulic control enables the LGSCU to respond promptly by providing the necessary force to steer and control the landing gear effectively, ensuring stability and precise handling during ground operations. This method leverages the characteristics of hydraulic systems, which provide a strong and adaptable means of controlling mechanical movements without requiring excessive pilot input or reliance solely on electrical systems.

In contrast, pilot input alone would not activate the LGSCU without the necessary hydraulic support. Automatic activation based on speed would rely on predefined thresholds that may not encompass the intricate needs of landing gear control. Additionally, while electrical signals can be part of the system's operation, they typically serve to activate the hydraulic systems rather than serve as a primary means of engagement on their own.