Plane indicating under maintenance able to send to different destinations but flight

I have one aircraft in bari showing under maintenance B
I am able to send different destinations
Now I m worried weather i will be sell after maintenance C
Same is scenario ngo as well

What is the problem, do you have a screenshot of what you mean?

If it’s what I’ve seen before, there are only certain airports you can send a plane to for maintenance, and you have to have a destination contract available for it, like all other destinations.
Does that help?