Which system is utilized to extend the gear in an Embraer Regional Jet?

The system utilized to extend the landing gear in an Embraer Regional Jet is the gear handle. This handle is specifically designed to manage the landing gear's deployment and retraction. When the pilot pulls the gear handle down, it activates the landing gear mechanism, which then allows the hydraulic system to extend the landing gear into position for landing.

The gear handle is the primary control that provides direct input to the landing gear system, indicating the pilot's intention to change the gear's position. By using this handle, the pilot can easily manage the landing gear during flight operations, ensuring a safe approach and landing.

Other systems mentioned, such as the hydraulic pump, while crucial in providing the necessary pressure to actuate the landing gear movement, are not directly controlled by the pilot in terms of gear extension. The landing gear control panel provides information and possibly command feedback to the pilot but does not directly extend the gear. Throttle control is unrelated to the landing gear operation and is used solely for managing engine power.