If both the A and B hydraulic systems are lost, is there a backup for the Ailerons and Rudders?

If both the A and B hydraulic systems are lost, is there a backup for the Ailerons and Rudders?

• A. Yes, it is manual reversion.
• B. Yes, Standby hydraulic system covers it.
• C. No backup exists.
• D. The landing gear system provides it.

Answer: (A)

When primary hydraulic power is unavailable, aircraft are designed with a mechanical backup path for the flight controls. This is known as manual reversion. It provides a direct mechanical linkage from the pilot’s controls to the ailerons and rudder, bypassing hydraulic actuators so you can still move the surfaces even with no hydraulic pressure. You’ll have control, though with more effort and reduced authority, so precise handling will be tougher. The standby hydraulic system is a separate, limited source of power intended to support essential functions, but it isn’t relied upon to restore full aileron and rudder actuation when both primary systems are lost. The landing gear system has no role in actuating these flight surfaces, so it isn’t a backup for control.

When primary hydraulic power is unavailable, aircraft are designed with a mechanical backup path for the flight controls. This is known as manual reversion. It provides a direct mechanical linkage from the pilot’s controls to the ailerons and rudder, bypassing hydraulic actuators so you can still move the surfaces even with no hydraulic pressure. You’ll have control, though with more effort and reduced authority, so precise handling will be tougher.

The standby hydraulic system is a separate, limited source of power intended to support essential functions, but it isn’t relied upon to restore full aileron and rudder actuation when both primary systems are lost. The landing gear system has no role in actuating these flight surfaces, so it isn’t a backup for control.