Regency Air Hawker 400XP’s for the Ultimate GA Hawker 400XP model.
These are textures only.
The Ultimate GA Hawker 400XP model is required.
It can be found as part of the Ultimate GA Beechjet package ugabj400.zip on Flightsim.com
The converted P3Dv4 model can be found here:
Flightplans available here: https://aibizjetproject.wordpress.com