[at1024]

I'm finally ready to take the CFII written. I already hold a Flight Instructor Certificate so I am just adding instrument privileges to it. I did not know this until today, but there's two instrument instructor exams, the 50 question FII and 20 question AIF (added rating).

Is the AIF meant for adding an instrument-airplane rating to an existing flight instructor certificate or would it be for adding another category (i.e. adding an instrument airplane to an existing instrument helicopter rating)??

Any help is appreciated.