Helmerich & Payne Learjet 75 for the JBAI model.
These are textures only.
The JBAI Learjet 45 model is required.
It can be found at https://library.avsim.net/download.php?DLID=79719
The converted P3Dv4 model can be found here:
https://www.alpha-india.net/forums/index.php?topic=32060.msg
Flightplans available here: https://aibizjetproject.wordpress.com/tag/helmerich-payne/