As far as the AD goes they are checking "structural Integrity" of the part which I agree is a pretty broad canvas but is a positive step to catching further damage before an incident or accident happens.
True, in as far as it goes. However, there's what looks like a contradiction here. The check is within the next 550 flight hours, or 3 months, so apparently not a panic, but in the body, it then says "in case of findings..or if damage to the rudder exceeds..... refer to Airbus structure engineering Customer support for an approved repair solution
before next flight
Somewhere, the timeframes don't quite tie in for me. Either there's damage that means it's not airworthy, or there is not, and to allow up to 3 months before finding out that it's not airworthy seems to me to be contradictory, or at least questionable.