They must conclude that an AD would not prevent recurrence of the event. Which would be the case if for instance the human / computer interface needs "refinement".
I do wonder what is occurring at Airbus right now. They must be quite frantic.
"You can never make the same mistake twice; because the second time you make it, it's not a mistake, it's a choice."
Yes
But who made the mistake under what regulation ?
Design/manufacture, Maintenance or Operations?