Assembly including a reverse thrust device and system for actuating said device

An assembly comprising:

• a reverse thrust device;
• and
• a system for actuating said reverse thrust device,
• said thrust reverse device including at least one cowl that is translatably mounted in a direction parallel to a longitudinal axis of a nacelle capable of passing alternately between a closed position, in which the cowl provides aerodynamic continuity of the nacelle, and an open position, in which the cowl opens a passage into the nacelle intended for a diverted flow, said moving cowl also being extended by at least one variable nozzle section, said nozzle including at least one rotatably mounted panel, said panel being suitable for pivoting towards at least one position causing a variation in the nozzle section, the system including an actuation means consisting of a single actuator that is capable of activating the respective translational and rotational movement of the cowl and the panel of the nozzle, wherein the system further includes:
• a downstream locking device for the nozzle and the cowl, the downstream locking device being activated by the single actuator and including at least two reversible states, one of said states being a locked state in which the downstream locking device locks the panel of the nozzle into a position for varying the section of the nozzle and locks the nozzle with the cowl such that the nozzle moves with the cowl.