At AA, In the ensuing aftermath of 587 they found ANOTHER vertical stab that needed to be replace. They were waiting over a year for it... They were pretty sure that damage had been in the stab for several heavy maintance checks and undiscovered by the Airbus procedures in place (and still recommended) at the time.
There was a lot of damage around the lug, that turned out to be undectable untill the entire stab was removed from the airplane, somthing that Airbus had strenously objected to American doing.
Cheers
Wino