Abstract: The invention relates to a locking assembly for locking an aircraft interior structure (13) to an internal mounting frame (2) comprising: a sliding element (1) which is suitable for insertion in the internal mounting frame (2), a height adjustment assembly, comprising a lower and an upper height adjustment part (4, 5). The assembly further comprises a fitting (6) attachable to the aircraft interior structure, having a recess wherein a projection (19) of the upper height adjustment part (5) is received, wherein the fitting (6) can be moved with respect to the projection (19) in a plane defined by Xr- and Yr-directions. Further provided is a locking bolt (11) received in the upper height adjustment part (5) for locking the fixation element (9), the fitting (6), and the height adjustment parts (4, 5) to the sliding element (1).