What are the names given to the 787's three primary hydraulic systems?

What are the names given to the 787's three primary hydraulic systems?

• A. Left, Center, and Right
• B. Forward, Aft, Wing
• C. Primary A, B, C
• D. Left, Right, Top

Answer: (A)

Hydraulic systems on the 787 are identified by their physical location: left, center, and right. This naming matches how the three independent hydraulic circuits are routed across the airplane, making communication about issues clear and quick for both crew and maintenance. Each system has its own pumps and reservoirs, providing redundancy so essential actuators and flight-control components can still operate if one system is unavailable. The other options don’t fit the actual layout or convention used on the 787—forward/aft/wing, or left/right/top, aren’t how the hydraulic circuits are labeled or organized.

Hydraulic systems on the 787 are identified by their physical location: left, center, and right. This naming matches how the three independent hydraulic circuits are routed across the airplane, making communication about issues clear and quick for both crew and maintenance. Each system has its own pumps and reservoirs, providing redundancy so essential actuators and flight-control components can still operate if one system is unavailable. The other options don’t fit the actual layout or convention used on the 787—forward/aft/wing, or left/right/top, aren’t how the hydraulic circuits are labeled or organized.