The Equinox is a small, twin engined plane unlocked at level 12 that has 3 cargo/passenger slots. It is the first jet plane that becomes available in the game and is possibly based off the real-life Eclipse 550. It might be tempting to build a bunch of these, but it is outclassed by the cheaper Mapple X-10, which has a higher capacity and can land at Class 1 and 2 airports. That being said, it is still a good moneymaker, and is useful for flying short distances to other airports.