I am not aware of an "on point" deviation, but I know of at least one where the pilot was cited for violating 91.205 for making an approach he was not equipped for.
I'm aware of that one, but there's a big difference between going ahead and flying an approach you're not equipped for, and diverting to an alternate that you are equipped for when you find out that the destination weather is not good enough for a visual approach. The latter is the same thing that happens when a person files to an airport that has no published approaches, which the FAA has never claimed is not allowed, as far as I know.
It will come up more often as so many VOR approaches are getting eliminated leaving only RNAV procedures at many smaller airports. There still are aircraft that are /A and /U that might file such a plan via IFR to one of these airports and it would be a shame to get a deviation due to ignorance of the rule.
There's a difference between a rule and an interpretation. The former are easy to find. The latter can require a lot of digging, and it requires the pilot knowing that there is something to dig for.
This interpretation is not as obvious as the FAA seems to think, because one could argue that when the pilot files IFR with the expectation of flying a visual approach, then "the route to be flown" is a visual approach, not any of the published approaches. If the weather does not meet the minimums for that route, then one goes to an alternate airport. The exact same thing happens if the airport has published approaches and the aircraft is equipped to fly them, but the weather does not meet the minimums for those approaches.
I think I recall an attorney on one message board or another pointing out that one of the shortcomings of the interpretation process is that, unlike case law that has been argued before a judge, there are not attorneys briefing or arguing both sides of the question, and thus there may be issues that never get properly considered.
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