Which of the following is NOT a part of a typical landing gear assembly?

In the context of a landing gear assembly, a control surface is not included because control surfaces are components that manage the aerodynamic control of the aircraft, such as ailerons, elevators, and rudders. These are separate systems primarily associated with the aircraft's ability to maneuver in flight.

In contrast, the shock strut, wheel assembly, and brake system are all integral parts of the landing gear. The shock strut absorbs the energy from landing impacts, the wheel assembly supports the weight of the aircraft and allows for movement on the ground, and the brake system is essential for the deceleration and stopping of the aircraft after landing. All these components work together to ensure safe landings and ground handling, while control surfaces serve a distinct and different function.