An assembly comprising: a fuselage having an opening; an aircraft door receivable in the opening; a hinge assembly comprising: a door support assembly, coupled to the aircraft door; a hinge arm assembly, comprising a first gear assembly, coupled to the fuselage, a second gear assembly, coupling the hinge arm assembly to the door support assembly, and a linkage assembly, coupled to the first and second gear assemblies; the linkage assembly comprising at least one first linkage member pivotally coupled to the first gear assembly and at least one second linkage member pivotally coupled to the second gear assembly and to the first linkage member; and a fifth pivot shaft, pivotally coupling said at least one first linkage member and said at least one second linkage member to the hinge arm assembly; the first and second gear assemblies and linkage assembly being configured to cooperate to move the door support assembly and hinge arm assembly with respect to each other, such that when the aircraft door is moved from a closed position where the aircraft door is received into the opening in the fuselage to an open position where the aircraft door is outside of the fuselage, the hinge assembly moves the aircraft door to an intermediate position where the aircraft door is parallel to and at a certain distance from an outer surface of the fuselage and maintains the aircraft door substantially parallel to and at the certain distance from the outer surface of the fuselage while moving the aircraft door from the intermediate position to the open position, the first gear assembly comprising at least one first gear coupled stationary with respect to the fuselage, and at least one second gear, pivotally coupled to the hinge arm assembly, and engaged directly with, and rotatable with respect to said at least one first gear when the hinge assembly moves the aircraft door between the open and closed positions. a fuselage having an opening; an aircraft door receivable in the opening; a hinge assembly comprising: a door support assembly, coupled to the aircraft door; a hinge arm assembly, comprising a first gear assembly, coupled to the fuselage, a second gear assembly, coupling the hinge arm assembly to the door support assembly, and a linkage assembly, coupled to the first and second gear assemblies; the linkage assembly comprising at least one first linkage member pivotally coupled to the first gear assembly and at least one second linkage member pivotally coupled to the second gear assembly and to the first linkage member; and a fifth pivot shaft, pivotally coupling said at least one first linkage member and said at least one second linkage member to the hinge arm assembly; the first and second gear assemblies and linkage assembly being configured to cooperate to move the door support assembly and hinge arm assembly with respect to each other, such that when the aircraft door is moved from a closed position where the aircraft door is received into the opening in the fuselage to an open position where the aircraft door is outside of the fuselage, the hinge assembly moves the aircraft door to an intermediate position where the aircraft door is parallel to and at a certain distance from an outer surface of the fuselage and maintains the aircraft door substantially parallel to and at the certain distance from the outer surface of the fuselage while moving the aircraft door from the intermediate position to the open position, the first gear assembly comprising at least one first gear coupled stationary with respect to the fuselage, and at least one second gear, pivotally coupled to the hinge arm assembly, and engaged directly with, and rotatable with respect to said at least one first gear when the hinge assembly moves the aircraft door between the open and closed positions. a door support assembly, coupled to the aircraft door; a hinge arm assembly, comprising a first gear assembly, coupled to the fuselage, a second gear assembly, coupling the hinge arm assembly to the door support assembly, and a linkage assembly, coupled to the first and second gear assemblies; the linkage assembly comprising at least one first linkage member pivotally coupled to the first gear assembly and at least one second linkage member pivotally coupled to the second gear assembly and to the first linkage member; and a fifth pivot shaft, pivotally coupling said at least one first linkage member and said at least one second linkage member to the hinge arm assembly; the first and second gear assemblies and linkage assembly being configured to cooperate to move the door support assembly and hinge arm assembly with respect to each other, such that when the aircraft door is moved from a closed position where the aircraft door is received into the opening in the fuselage to an open position where the aircraft door is outside of the fuselage, the hinge assembly moves the aircraft door to an intermediate position where the aircraft door is parallel to and at a certain distance from an outer surface of the fuselage and maintains the aircraft door substantially parallel to and at the certain distance from the outer surface of the fuselage while moving the aircraft door from the intermediate position to the open position, the first gear assembly comprising at least one first gear coupled stationary with respect to the fuselage, and at least one second gear, pivotally coupled to the hinge arm assembly, and engaged directly with, and rotatable with respect to said at least one first gear when the hinge assembly moves the aircraft door between the open and closed positions.