Is this really true, or a lack of understanding of the systems on the part of the crew? I find it extremely hard to believe that a plane can't set goaround thrust without a glideslope. So what, that type cannot fly a non-precision or visual approach?
There is also a flap extension trigger in the thrust logic (on 747-400/767-300), but I'm just exploring the "what if" extremes.
If you can't extend the flaps and weather has suddenly turned marginal (or worse) at all alternates, etc, then why not use all the tools at your disposal?
And if you are in VMC and the "loc is broke", then what is the harm? Isn't it something nice to have? Of course, you still have raw data to guide you.
Sorry, I don't know the rules of the air... purely an former engineer's questions/ramblings... Thanks for your response.