diff --git a/lib_planes/entities.lua b/lib_planes/entities.lua
index 63f3126..54b23f2 100644
--- a/lib_planes/entities.lua
+++ b/lib_planes/entities.lua
@@ -15,7 +15,6 @@ function airutils.get_staticdata(self) -- unloaded/unloads ... is now saved
         stored_power_lever = self._power_lever,
         stored_driver_name = self.driver_name,
         stored_last_accell = self._last_accell,
-        stored_engine_running = self._engine_running,
         stored_inv_id = self._inv_id,
         stored_flap = self._flap,
         stored_passengers = self._passengers,
@@ -41,7 +40,6 @@ function airutils.on_activate(self, staticdata, dtime_s)
         self._power_lever = data.stored_power_lever
         self.driver_name = data.stored_driver_name
         self._last_accell = data.stored_last_accell
-        self._engine_running = data.stored_engine_running
         self._inv_id = data.stored_inv_id
         self._flap = data.stored_flap
         self._passengers = data.stored_passengers or {}
diff --git a/lib_planes/forms.lua b/lib_planes/forms.lua
index fc0e261..11c68c8 100644
--- a/lib_planes/forms.lua
+++ b/lib_planes/forms.lua
@@ -189,10 +189,16 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
             end
 		    if fields.go_out then
                 local touch_point = ent.initial_properties.collisionbox[2]-1.0
-                local touching_ground, liquid_below = airutils.check_node_below(plane_obj, touch_point)
-                local is_on_ground = ent.isinliquid or touching_ground or liquid_below
+                -----////
+                local is_on_ground = false
+                local pos = plane_obj:get_pos()
+                pos.y = pos.y + touch_point
+                local node_below = minetest.get_node(pos).name
+                local nodedef = minetest.registered_nodes[node_below]
+                is_on_ground = not nodedef or nodedef.walkable or false -- unknown nodes are solid
 
                 if ent.driver_name == name then
+                    --minetest.chat_send_all(dump(noded))
                     if is_on_ground then --or clicker:get_player_control().sneak then
                         --remove the passengers first                
                         local max_seats = table.getn(ent._seats)