Hello AM,
I can tell you this was discovered in the mid 1980s and was revised around 2002-2003. The models affected are all of the A300-600/B4 series.
I would imagine there to be a zero tolerance for cracking in this area, but do not know this as a fact. There are of course repair procedures and corrective measures that can be taken regarding the attachment points and hardware. Check Airbus for a service bulletin on this to get the specs you are after.
This item requires regular inspections.
Oh, and welcome to the forums.
vap