EASA has just issued the 4th AD for Blanik L-13's, issued 3 SEP,
effective 5 SEP 2010:
http://ad.easa.europa.eu/ad/2010-0185-E
This supercedes the previous 3 AD's on the L-13 spar inspection.
Expect FAA will issue yet another AD soon.
Burt
(currently near Munich)