I did, in fact, spend a bit of time trying to look this up, because as pointed out by other comments, it was not entirely clear what relationship this revocation (which is about inspecting built aircraft vs the design) had to do with the crashes (which were primarily the result of a faulty design). I didn't find a particularly illuminating summary other than maybe the investigation also turned up some other problems.

More to the point, the original poster was implying that there would be a relationship between the reinstatement of Boeing's self-certification and future crashes. Which I think would be worth some deeper analysis beyond 'corporations bad'.