Thanks for the translation.
Any idea what organization or who wrote it?
To me it's an adquate justification for the proposed airworthiness directive to bring the aircraft back into compliance under the Contuned Airworthiness norms.
My interpretation of this is that the initial design certication usinig historical norms would have treated the Pitots malfunction as a defect presumably accomodated by procedures and the use of other systems to control the aircraft.
The "What-if" scenario based on other similar pitot malfunctions now raises the issue that it should no longer be treated as a "defect", easily accomodated, in all likely scenarios thus requiring a more robust/reliable accomodation (unique pilot training?) or a decrease in the liklihood of the combinations.