An email from the Union a few hours ago says future classes recently announced are July 11 and 18, August 1, 8, 22, and 29th.

I assume the breakdown would be 767 classes on 7-11, 8-1, and 8-22 and 747 classes on 7-18, 8-8, and 8-29. That would maintain the planned 3 week spread between each class for a given airframe.