In an early scene of Ep. 1 the accident plane is shown from the rear and it is clearly an Airbus 319 or 320 (round APU exhaust). Later, in Ep.2 the accident is said on a news show to be a Boeing 737. Later still, in Ep.3, an interior shot is of an MD80 or a plane of that series (2/3 seating). Another exterior shot finally shows a Boeing 737.