Modern aircraft have excellent redundancy. Commercial aircraft already typically have 3 Pitot* tubes and 3 static ports. They need unobstructed airflow and are placed accordingly. In this kind of aircraft they do cross-verify each other as well, but if they all are reading different values, there&#x27;s not much to be done. Conditions were such on AF447 that they all experienced some amount of icing until the aircraft descended enough. I don&#x27;t see how having one more pitot tube is the proper response.