setElementData(source,"onplane",true,true) 
 
edit: sry, this is synchro. Try now 
  
  
function getPointFromDistanceRotation(x, y, dist, angle) 
  
    local a = math.rad(90 - angle); 
  
    local dx = math.cos(a) * dist; 
    local dy = math.sin(a) * dist; 
  
    return x+dx, y+dy; 
  
end 
  
 local count = 0 
  
function vehicleAndromadaHandling(pe,ce) 
    if isElement(ce) and getElementType(ce) == "vehicle" and getElementModel(ce) == 592 then 
            setPedRotation(source, 180) 
            setCameraTarget(source,source) 
            setElementData(source,"entveh",ce,false) 
            setElementData(source,"onplane",true,true) 
            setElementInterior(source,9,315.64258,1031.65771,1947.08655) 
            if isTimer(AndroTimer) ~= true then 
            AndroTimer = setTimer( 
                function() 
                for index, player in ipairs(getElementsByType("player")) do 
                    if getElementData(player,"onplane") then 
                        count = 1 
                        local x,y,z = getElementPosition(player) 
                        if getElementInterior(player) == 9 and z>1900 and z<1946.72034 then                         
                            local px,py,pz = getElementPosition(getElementData(player,"entveh")) 
                            local rotx,roty,rotz = getVehicleRotation(getElementData(player,"entveh")) 
                            local distance = getDistanceBetweenPoints3D(px,py,pz,x,y,z) 
                            local newx, newy = getPointFromDistanceRotation(px,py,distance,rotz) 
                            setElementInterior(player,0,newx,newy,pz) 
                            setPedRotation(player,rotz) 
                            setCameraTarget(player,player) 
                        end 
                    else 
                        count = 0 
                    end 
                end 
                if count == 0 then killTimer(AndroTimer) end 
            end 
            ,250,0) 
                
            end 
        end 
end 
addEventHandler("onPlayerContact",getRootElement(),vehicleAndromadaHandling)