ประตูเครื่องบินไม่สามารถเปิดได้ระหว่างบิน

Aircraft doors are designed as plug doors that open inward before swinging outward. At cruising altitude, the pressure differential between the inside and outside of the aircraft is roughly 55 kPa. This pressure pushes on the door area with a force equivalent to several tonnes, far exceeding what any human could overcome. Even if the handle is actuated, the door simply cannot move inward against this force.