How do crossfeed lines support gear operation in a dual-hydraulic system?

• A. They provide backup electrical signals for gear position.
• B. They bypass crossfeed to keep tension in lines.
• C. They allow pressure to reach all actuators even if one hydraulic path is unavailable.
• D. They only assist in extending the gear doors.

Answer: (C)

Crossfeed lines provide hydraulic redundancy by tying the two independent hydraulic circuits together so pressure from one side can reach actuators on the other. In a dual-hydraulic landing gear system, this means that if one hydraulic path or pump becomes unavailable, the other path can still deliver pressure to all gear actuators and doors through the crossfeed. This sharing of pressure ensures the gear can extend or retract and the associated doors can operate even in a partial system failure. It’s not about electrical signaling or maintaining line tension; it’s about keeping hydraulic energy available to all actuators when one path is down.