An aircraft door comprising: - a door structure on its internal face; - an outer panel on its external face; - an external opening/closing lever, pivoting between a closed position, in which it retracts into the outer panel, and an open position; - an internal opening/closing lever disposed on the internal face of the door, this internal opening/closing lever pivoting between a closed position and an open position; - an engaging mechanism designed to couple the external opening/closing lever to the internal opening/closing lever; - the engaging mechanism also comprises: - a stop that rotates as one with the external opening/closing lever and a counter-stop that rotates as one with the internal opening/closing lever, the stop being designed to entrain the counter-stop when the internal opening/closing lever is in its closed position and the external opening/closing lever is pivoted from its closed position to its open position; - a lug that rotates as one with the internal opening/closing lever and exhibits a circular path when the internal opening/closing lever is pivoted; - an engaging pawl mounted so as to pivot on an axle which rotates as one with the external opening/closing lever, between a passive position in which the engaging pawl is spaced apart from the path of the lug, and an active position in which the engaging pawl is disposed on the path of the lug; - a support base secured to the door structure and designed to push the engaging pawl back into its passive position when the external opening/closing lever is in its closed position. - a door structure on its internal face; - an outer panel on its external face; - an external opening/closing lever, pivoting between a closed position, in which it retracts into the outer panel, and an open position; - an internal opening/closing lever disposed on the internal face of the door, this internal opening/closing lever pivoting between a closed position and an open position; - an engaging mechanism designed to couple the external opening/closing lever to the internal opening/closing lever; - the engaging mechanism also comprises: - a stop that rotates as one with the external opening/closing lever and a counter-stop that rotates as one with the internal opening/closing lever, the stop being designed to entrain the counter-stop when the internal opening/closing lever is in its closed position and the external opening/closing lever is pivoted from its closed position to its open position; - a lug that rotates as one with the internal opening/closing lever and exhibits a circular path when the internal opening/closing lever is pivoted; - an engaging pawl mounted so as to pivot on an axle which rotates as one with the external opening/closing lever, between a passive position in which the engaging pawl is spaced apart from the path of the lug, and an active position in which the engaging pawl is disposed on the path of the lug; - a support base secured to the door structure and designed to push the engaging pawl back into its passive position when the external opening/closing lever is in its closed position. - a stop that rotates as one with the external opening/closing lever and a counter-stop that rotates as one with the internal opening/closing lever, the stop being designed to entrain the counter-stop when the internal opening/closing lever is in its closed position and the external opening/closing lever is pivoted from its closed position to its open position; - a lug that rotates as one with the internal opening/closing lever and exhibits a circular path when the internal opening/closing lever is pivoted; - an engaging pawl mounted so as to pivot on an axle which rotates as one with the external opening/closing lever, between a passive position in which the engaging pawl is spaced apart from the path of the lug, and an active position in which the engaging pawl is disposed on the path of the lug; - a support base secured to the door structure and designed to push the engaging pawl back into its passive position when the external opening/closing lever is in its closed position.