We had this issue examined a couple of years ago due some kids flying the 210 like an A10
We handed out this leaflet to the pilots (Australians examined the problem quite earlier than FAA did):
http://www.ageingaircraft.com.au/ass...0Structure.pdf
The articles to the AD are here:
Federal Register, Volume 77 Issue 98 (Monday, May 21, 2012)
Spar cap crack reports prompt call for C210 inspections