[Sergei]

And also this would be working and simplier method

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if((newkeys & KEY_CROUCH))
    {
      if(IsAPlane(GetPlayerVehicleID(playerid))
      {
        GivePlayerWeapon(playerid,46,1);
        new Float:pos[3]; GetPlayerPos(playerid,pos[0],pos[1],pos[2]);
        SetPlayerPos(playerid,pos[0],pos[1],pos[2]+30);
        GameTextForPlayer(playerid, "EJECTING", 5000, 5);
      }
    }
}