Which system must be checked before using the rotor brake?

Which system must be checked before using the rotor brake?

• A. Hydraulic system
• B. Fuel system
• C. Electrical system
• D. Cooling system

Answer: (A)

The hydraulic system must be checked before using the rotor brake because the rotor brake relies on hydraulic pressure to function properly. Ensuring that the hydraulic system is in good condition and adequately pressurized is crucial for the effective operation of the rotor brake, as it is designed to slow down or stop the rotor blades during ground operations. Any issues within the hydraulic system could lead to brake failure or inefficient braking, posing a risk during pre-flight checks and operations. The other systems, while important for the overall functionality of the helicopter, do not directly impact the operation of the rotor brake. For instance, the fuel system is mainly concerned with engine operation, the electrical system is involved in powering various instruments and controls, and the cooling system helps regulate engine temperatures but does not influence the hydraulic functions related to rotor braking. Thus, the hydraulic system is paramount to verify before engaging the rotor brake.

The hydraulic system must be checked before using the rotor brake because the rotor brake relies on hydraulic pressure to function properly. Ensuring that the hydraulic system is in good condition and adequately pressurized is crucial for the effective operation of the rotor brake, as it is designed to slow down or stop the rotor blades during ground operations. Any issues within the hydraulic system could lead to brake failure or inefficient braking, posing a risk during pre-flight checks and operations.

The other systems, while important for the overall functionality of the helicopter, do not directly impact the operation of the rotor brake. For instance, the fuel system is mainly concerned with engine operation, the electrical system is involved in powering various instruments and controls, and the cooling system helps regulate engine temperatures but does not influence the hydraulic functions related to rotor braking. Thus, the hydraulic system is paramount to verify before engaging the rotor brake.