Right on! I just got back from a trip where I was able to get all the information Bobby provided from the Maintenance Manual. That is exactly the reason of the F/D dissappearance and I wonder why as pilots, we have to do so much digging for the information? No where in the Boeing Ops. manuals is it mentioned that one of the Flight Director functions is the BOV (F/D commands bias out of view). The sole existence of the IFSAU was unknown to me and what it does, as well. I remember the famous "chapter five" we had to learn back and forth when we took the B-727 initial training. Everything was in there, but now a days in the era of only caution ranges and red lines, much needed information is not provided to the pilots anymore. Thanx again for that explanation Bobby, great job!