timz
You would not fail an IRT for momentarily going below DA whilst initiating a Go Around. I think Moggie is wrong above. A DA is exactly that, a decision point, not as in a Non precision app, a MINIMUM descent altitude which you would definitely fail an IRT for busting.
A missed app from a precision app will have the fact that you will sink below DA factored into it with regards terrain clearance etc.
Simple really isnt it..............!