Joint assembly

A method of joining a first aircraft component to a second aircraft component comprising:

• rotatably mounting an eccentric bush to a first aircraft component, said eccentric bush comprising a rotational axis and a projection mounted on said eccentric bush such that rotation of the eccentric bush about the rotational axis causes movement of the projection in both a first and a second orthogonal direction relative to the first aircraft component, wherein said first and second orthogonal directions are substantially perpendicular to the rotational axis of the eccentric bush, and wherein the projection further comprises an aperture having a threaded surface;
• rotatably mounting a rail having a correspondingly threaded surface to a second aircraft component, wherein said rail has a longitudinal axis which extends in a direction substantially parallel to the second orthogonal direction;
• rotating the eccentric bush about its rotational axis so as to alter a position of the projection in the first orthogonal direction;
• locating the rail within the aperture provided in the projection such that the threaded surface of the rail engages with the threaded surface of the aperture;
• and
• axially rotating the rail relative to the aperture so as to move the projection along said rail in the second orthogonal direction so as to account for unwanted changes in the position of the projection in the second orthogonal direction following rotation of the eccentric bush.