blanik life limits, and new AD

It looks like there is a new (US) AD for the L13 comming, cracks
where the control sticks attach to the "control bridge".
My biggest question is the life limits for the L13. We do a lot
of structural work here, and I cannot find anything on our L13 that
looks questionable. I am not at the limit, but will be eventually,
Have there been any problems or failures? What is being done to
address this limit, and how far have operators gone . and what did
they do to stretch this limit. This is for US based planes mostly,
but other countries would certainly interest me. I hear all sorts of
things about 10,000 hours on L13s, but have no real information.
thanks a bunch, John Barron 573 565 2819