Make the AI not flyable
 

On my server i can select AI planes and jump into them when they are on a mission.. problem is when they are timing out and despawns. The players wil then get disconnected..
So i guess its one of the following lines that needs a "1" but Wich one ?

difficulty NoReplacementPlace 0
difficulty NoReplacement 0
difficulty NoSelect 0
difficulty NoReplacementArmy 0
difficulty NoSelectArmy 0
difficulty NoCreate 0

~S~
Wandalen

Maybe the 2nd one but needs testing.

Alternatively you can timeout planes only OnAircraftLanded or crashlanded or OnPlaceLeave.