How can the standby hydraulic pump be activated manually?

• A. By turning the main engine off
• B. By positioning either FLT CONTROL switch to STBY RUD
• C. By pressing the emergency pump button
• D. By opening the hydraulic fluid reservoir

Answer: (B)

The standby hydraulic pump is designed to provide hydraulic pressure in the event of a primary system failure, ensuring continued operation of essential systems. To activate the pump manually, one typically positions either the flight control switch to the standby rudder (STBY RUD) setting. This action engages the standby system, allowing it to function independently of the main hydraulic system and ensure necessary control, particularly for critical systems like the rudder.

Activating the standby pump using the control switch provides precise operational readiness and integrates well into the aircraft's overall hydraulic management. The control switch essentially signals the system to divert to standby, making it an efficient and reliable method of ensuring hydraulic pressure is maintained when needed.

Thus, positioning the FLT CONTROL switch to STBY RUD is the best practice for engaging the standby hydraulic pump manually.