Abstract: The present disclosure relates to an aircraft having a fuselage. The fuselage may have a plurality of frame members, a cabin formed within the fuselage, a floor defining a portion of the cabin, a center section of seats disposed on the floor, a crown positioned above a center section of seats, and a crew rest module. The crew rest module may have an entrance module defined by at least two entrance module peripheral walls and having a seating area, and a bunk module being separate from the seating area and being defined by at least three bunk module peripheral walls. The entrance module peripheral walls and the bunk module peripheral walls may be sized to fit through a passenger door of a substantially assembled aircraft.