boeing wanted to make the plane as safe as possible. they made the plane strong and put in things to make passengers more comfortable. for example, the cabin had air conditioning. it was also sound-proof. the plane had a pilot, co-pilot and a flight attendant. the wheels did not fully go into the plane. a part of the wheels hung down below the plane. this was done to make it safer for the plane to land if the landing gear could not be put down. the wheel at the back of the plane could not be moved.