Fan module impeller, and jet turbine engine equipped with such an impeller

A turbojet engine fan module wheel, having an axial direction, a radial direction and a circumferential direction, an upstream face and a downstream face, the wheel comprising a plurality of blades made of fiber-reinforced organic-matrix composite material, each blade of the plurality of blades having a root assembled with a base distinct from the bases of the other blades of the plurality of blades, each of the respective bases having a groove extending axially and opening out on a side of the upstream face and/or on a side of the downstream face, each of the respective roots cooperating by axial interlocking in a form-fitting manner, optionally in a shape of a dovetail, with the respective grooves of the respective bases, whereby the respective root is retained on the respective base along the radial direction and the circumferential direction, and each of the respective bases cooperates with at least one part configured to axially block the respective root within the respective groove of the respective base, whereby the respective root is retained along the axial direction, wherein the plurality of blades are variable pitch blades, each of the respective bases being mounted on the at least one part configured to axially block the respective root within the respective groove of the respective base, wherein the at least one part is a single part distinct from the single parts of the other bases, each of the at least one part being configured to pivot around the radial direction, wherein each root of the plurality of blades and each of the respective grooves extend along the radial direction of the plurality of blades and the fan module wheel, each of the single parts comprises an annular collar which is fixed to a corresponding annular flange of each of the respective bases using fasteners extending longitudinally in the radial direction.