Abstract: A mounting apparatus for mounting the pilot's display unit for a head-up display system in an aircraft cockpit affords a stowage position for the display unit which does not restrict the pilot's movement or obscure his vision, and further provides ease of transition between the operating and stowage positions. The mounting apparatus provides a crash-release feature which permits the pilot's display unit to breakaway forwardly upon impact and to be constrained in a forward position to prevent the display unit from rebounding violently rearwardly toward the pilot's head. The mounting apparatus further provides a quick-replacement capability which permits fast and easy removal and installation of the pilot's display unit with a minimum of tools and no need for realignment.