I just got an official answer concerning two questions I had about aircraft that I was unable to answer myself using the Zverograd rules:

“Do aircraft block line of sight between other units although they are hovering above other units? No.

Can aircraft be repaired or brought back into the game using the Command squad's abilities? I know the rules concerning Command squads only talk about "vehicles", but then, they were written before aircraft even existed in DT.

Yes. Aircraft can be repaired or brought back into the game using a Command Squad's mechanic abilities.”