One problem is that it's hard to find material about action science that's approachable while not trivial. I have a few links for those who are interested.
Someone in a Web discussion I subscribe to pointed to a an article on infed that is a pretty good short introduction to the theory. Roger Schwarz' The Skilled Facilitator provides a good albeit longer introduction to its practice. Perhaps one of the more interesting introductions comes in a book by colleague Bob Dick and his colleague Tim Dalmau: see Values in action: applying the ideas of Argyris and Schon. A version of its first chapter is available online.
Of course, you can always read any of the books Chris Argyris has written, such as Overcoming Organizational Defenses : Facilitating Organizational Learning. Reading his books is the way I got started, but it wasn't easy; I found that it takes quite a bit of study, trial (and error), and self-reflection to internalize what he says directly. It does seem easier if you have someone who can observe what's going on and interject comments and inquiries to help you (a facilitator, as it were).
However you choose to address it, I encourage you to pay serious attention to this issue. I've seen too many organizations suffer because of challenges they faced in working with each other internally, and I don't want you to suffer that fate when there are good approaches you can learn.