Abstract: A propulsion system for an aircraft having: a nacelle which has two cowls that are movable between a closed position and an open position, for each cowl, an actuation system arranged to move that cowl from the open position to the closed position and vice versa, and for each cowl, a holding system arranged to hold that cowl in the open position.

Abstract: A nacelle for a motorization system of an aircraft, wherein the nacelle includes at least one cover mounted in an articulated manner between a closed position and an open position about a hinge axis and, for each cover, at least one motor assembly including an actuating shaft movable in rotation about the hinge axis. The actuating shaft is configured to move the associated cover between the closed position and the open position. With such an arrangement, the motor assembly is integrated into the hinge so as to ensure an optimum footprint and to provide unobstructed access to the core arranged in the nacelle.