When extending the gear using the emergency system, which occurs?

• A. The emergency system gear extension actuators are pressurized
• B. Hydraulic pressure from the emergency lines activates the normal landing gear actuators
• C. The primary hydraulic system lines are pressurized to 3000 +/- 120 psi
• D. The power package slide valve routes fluid to the accumulator

Answer: (B)

During emergency gear extension, hydraulic pressure from the emergency lines is applied to the landing gear actuators, driving them to extend the gear. This setup lets the gear come down even if the normal hydraulic system isn’t available. The key idea is that the emergency pressure powers the same actuators that move the gear, rather than relying on the primary system. While there may be accumulators and valves in the overall path, the immediate action is the emergency pressure acting on the gear actuators to extend.