If the A hydraulic system is lost, is there a backup for the Ailerons and Elevators?

If the A hydraulic system is lost, is there a backup for the Ailerons and Elevators?

• A. Yes, on the B hydraulic system.
• B. No backup exists.
• C. The Standby hydraulic system provides it.
• D. Manual reversion provides it.

Answer: (A)

Redundant hydraulic systems provide backup for flight controls. The ailerons and elevators are powered by both the A and B hydraulic systems, so if the A system is lost, the B system can still actuate those surfaces. This setup keeps you in control by design, using the other hydraulic system as the backup. The standby hydraulic system is a separate, limited source intended for essential surfaces if main hydraulics fail, and manual reversion would only come into play as a last resort with limited capability. So the immediate backup for the Ailerons and Elevators when A is lost is the B hydraulic system.

Redundant hydraulic systems provide backup for flight controls. The ailerons and elevators are powered by both the A and B hydraulic systems, so if the A system is lost, the B system can still actuate those surfaces. This setup keeps you in control by design, using the other hydraulic system as the backup. The standby hydraulic system is a separate, limited source intended for essential surfaces if main hydraulics fail, and manual reversion would only come into play as a last resort with limited capability. So the immediate backup for the Ailerons and Elevators when A is lost is the B hydraulic system.