Mounting the AHRS unit so that it is removable from below. A sliding lock plate allows the AHRS to be eaisly removed from below the panel. A plate is attached to bottom with fushhead screws so it will slide along the mounting angles. Forward end of this plate slides under a locking clip, and aft end is locked down with a sliding clip with hexhead screws that thghten from below Claude Stokes 5/26/2007