Please excuse my ignorance with the question, but is it possible to fly a complex commercial jet airliner like this when the flight instruments go whacky by pretending it's a Cessna 172, set the power manually, fly an attitude manually, trim it manually, and look outside? Or is that too difficult for pilots of push button planes now?
And in this instance where an air data computer (or whatever gizmo) was replaced as a fix for a defect entered into the technical log, is a maintenance assessment flight required to actually check that the fault has been fixed?