Originally Posted by
andmiz
So, you've abandoned an approach due to a system degradation, and you want to fly another RNP approach despite the system degradation? No...you need to look for non RNP based approaches (which may be a visual approach).
Sure, but let’s say there is no other approach available and the weather is at the applicable minima. What are now the possible implications? What are the risks and benefits of another approach versus diverting?
I guess that’s what TS is aiming for in this discussion. Let’s say the RNP issue clears during the missed approach. Why not try a second approach? Obviously the RMP system worked as intended.
It’s an interesting question. I’m not sure I would like to go down into the INN valley with a NAV system that just, for whatever reason, lost its confidence in tracking. On the other hand, the system worked as intended. It warned you of its (transient?) failure.