What energy source actuates the main entry door up?

• A. Hydraulic from left system
• B. Electric via the right aft battery
• C. Pneumatic from the main system
• D. Manual crank

Answer: (B)

The main entry door is powered by an electric motor tied into the aircraft’s electrical system, specifically drawing power from the right aft battery. Electric actuation provides precise, controlled opening and closing, easy integration with cockpit/cabin door controls, and reliable operation without routing hydraulic or pneumatic pressure to the door. It also avoids hydraulic circuit complexity and potential leaks associated with other systems. A manual crank is not used for normal operation because electric drive offers faster, safer, and easier operation.