Draft FAA Advisory Circular Should Clarify HUD Installations

The FAA issued draft Advisory Circular 25-11A, which provides advice on how head-up displays can be designed, tested and installed in Part 25 transport-category airplanes. However, the AC’s new HUD content, which is found in Appendix 6, clearly states that it is not a source of means of compliance for display of enhanced vision or synthetic vision system imagery on HUDs. The new Appendix 7 of the updated AC covers guidance for standards that should be considered for display of weather information on avionics. Comments on the draft AC are due by December 31.