A further question We know that a c fly by wire The Concorde had an analogue signal modifier to give good flight handling From inception Airbus had flight envelope limitation to stop the pilot making a mistake although the pilot can turn it off Comment the Indian crash was blamed on pilot error Presumedly all modern passenger a c have a digital computer between the pilot and the control surfaces The issue is can the pilot switch all the digital systems off or to fly must control still pass through a computer In anticipation thanks