Is there a backup to nose-wheel steering?

Is there a backup to nose-wheel steering?

• A. Yes, the main is on system A and an alternate is on system B.
• B. No backup exists.
• C. Yes, there is a backup on the Standby hydraulic system.
• D. Yes, both backups are on the A system.

Answer: (A)

Nose-wheel steering is designed with redundancy to keep you in control on the ground even if one hydraulic path fails. The main steering path normally runs off the primary hydraulic system, and there is an alternate path fed by the other hydraulic system. This setup lets you continue steering if the main system loses pressure, using the alternate path on the second system. The standby hydraulic system isn’t used as the nose-wheel steering backup in this configuration, and having both backups on the same system would remove real redundancy. So the best arrangement is that the primary uses system A and the backup uses system B.

Nose-wheel steering is designed with redundancy to keep you in control on the ground even if one hydraulic path fails. The main steering path normally runs off the primary hydraulic system, and there is an alternate path fed by the other hydraulic system. This setup lets you continue steering if the main system loses pressure, using the alternate path on the second system. The standby hydraulic system isn’t used as the nose-wheel steering backup in this configuration, and having both backups on the same system would remove real redundancy. So the best arrangement is that the primary uses system A and the backup uses system B.