Described are seat pan assemblies for a passenger seat having a pan frame pivotally coupled to a seat back, a seat pan pivotally coupled to the pan frame, a tilting mechanism coupled to the seat pan and the pan frame, wherein the tilting mechanism is configured to rotate the seat pan between an upright position and a sleeper position, and an automatic release mechanism, wherein the automatic release mechanism is configured to return the seat pan to an upright position when the seat back is in an upright position.