wrong position of parts, aircraft left to right asymetry, fuselage curvature, extra aircraft, missing engines, wrong landing gear location, wing asymetry, wrong engine position and symetry, wrong aircraft structure, wrong windows, window asymetry, wrong engine location, wrong gears, wrong stabilizer, uneven surfaces where required, wrong wings, wrong wing level, wrong tail, wrong composition, missing small details, unreal aerodynamics, unreal structure lines, missing strutural details, unreal look, parts detached 