There's a small percentage that don't make it through. I can't comment as too why. I will say that the training department is very good and will work to get you through as long as you put forth a good effort. Extra sim and IOE are common for those that are struggling.

Seeing how you use to work at Transtates and have gone through a 121 program before you should have an idea on what the expectations might be. They really want you to succeed. Really, management is desperate for pilots.