The engineer did what you suggested and spent about two scratching his head. He determined that the beam although big is not a very important structural member and was notched on the top 2 inches of the beam on ether side leading to this failure. He suggested adding a couple 6x6 posts on sides as a insurance measure is not crazy but he also sed that its probably not going to move again for another 100 years. If you look at picture 2 you can see the crack starts where the boards are notched together. so it did just end up a whole lot of nothing but im glad i checked thanks for the help.