Abstract: An aircraft structure dynamic loading testing device, including a nozzle, an attachment mechanism with a first portion attached to the nozzle such that a nozzle force direction is constrained at a set orientation and a second portion for attaching to the aircraft structure and configured to be constrained at a given orientation with respect to the aircraft structure, and a length of conduit. In use, fluid is supplied along the length of conduit to the nozzle and ejected from the nozzle such that the nozzle exerts a dynamic force on the aircraft structure in the direction of the nozzle force direction. A dynamic loading testing device, a kit of parts and methods of dynamic load testing of a structure are disclosed.