How to recreate:
-Select an aircraft/vehicle from the hangar which is unable to fly due to FH/VH down or ENY
-Try to launch by clicking any takeoff directions (N/S/SW etc) you should get the pop up stating "unable to fly plane from this field" or ENY message(standard)
-Keep trying to launch by clicking directional button to takeoff but do not close the pop up boxes that come up each time.
-Continue clicking a direction to takeoff until CTD occurs.
Just something I noticed it's a little nitpicking but maybe it helps somehow.