Aircraft having a pivoting landing gear provided with a pivot locking system and a monitoring system

An aircraft provided with a pivoting landing gear provided with a stand and with a pivoting assembly carrying a contact member that is configured to be in contact with the ground, the pivoting assembly being able to move in rotation about a pivot axis relative to the stand, the pivoting landing gear having a pivot locking system comprising a movable locking finger and a passage provided in a base, the locking finger being outside the passage in an unlocked mode in order to leave the pivoting assembly free to pivot relative to the stand, the locking finger being placed in a locked mode in the passage in order to restrict the pivoting, the locking finger being carried by the stand and the base belonging to the pivoting assembly,

• wherein the aircraft comprises a monitoring system configured to determine the presence of a risk of sudden yaw movement of the aircraft in the event of a take-off or an unlocking of the pivoting landing gear when the locking finger is in the locked mode on the ground, the monitoring system being configured to emit, to a processing system, a risk signal following a determination of the presence of the risk of sudden yaw movement, the monitoring system being configured to determine the presence of the risk of sudden yaw movement when a value relating to a force in the locking system is greater than a limit, the monitoring system comprises at least one sensor for measuring the value and a controller, the sensor emitting, to the controller, a measurement signal carrying the value, the controller being configured to determine whether the value is greater than the limit and to generate the risk signal as a result.