If the backup hydraulic pump fails to come on, what is your immediate action?

If the backup hydraulic pump fails to come on, what is your immediate action?

• A. Backup Hyd Pump Switch On
• B. Backup Hyd Pump Switch Off
• C. Initiate Emergency Unlock
• D. Reduce Collective

Answer: (A)

When the hydraulic system relies on the backup pump, energizing that electric pump is the first move to try to restore hydraulic control. Turning the Backup Hyd Pump switch ON sends power to the backup pump, initiating hydraulic pressure to the flight controls. This is the immediate action because without pressurized hydraulics, control inputs become very heavy and sluggish. If the pump still doesn’t come on after switching it ON, you would follow the prescribed abnormal/emergency procedures, but the critical first step is to energize the backup pump. Switching it OFF would remove the backup source when you’re already experiencing a hydraulic loss, and reducing collective or initiating an emergency unlock does not directly restore hydraulic power.

When the hydraulic system relies on the backup pump, energizing that electric pump is the first move to try to restore hydraulic control. Turning the Backup Hyd Pump switch ON sends power to the backup pump, initiating hydraulic pressure to the flight controls. This is the immediate action because without pressurized hydraulics, control inputs become very heavy and sluggish.

If the pump still doesn’t come on after switching it ON, you would follow the prescribed abnormal/emergency procedures, but the critical first step is to energize the backup pump. Switching it OFF would remove the backup source when you’re already experiencing a hydraulic loss, and reducing collective or initiating an emergency unlock does not directly restore hydraulic power.