if its aflap, you dont need to look-- just try deploying flaps. if you roll, ones gone. it its ailerons, try rolling. if it rolls faster one way than the other, one aileron is gone. idk about elevators, never tried. gear is easy-- red light. engine-- also easy, espcially in a multi-engine. rudder-- easiest. just lightly tap the rudder, and if theres no response, your rudders gone. tada!