TacoyakiBoom wrote on Aug 2^nd, 2021 at 1:14am:

P3D's draft flight planner

Is this the default P3Dv5 flight planner? If this is what you are referring to, then all you should need to do, is create the flight plan, save it, return to the L-1011. Go back to the planner, select the flight plan, load it (it's up to you if you select yes to go to the airport (it's actually the airport runway) or not) and it should be visible in the INS.

Note. I always refer to the P3D flight planner as the "defaiult P3D flight planner" because it's the one you get when you install P3D. ;)