This only my second year as an RO, so I'm certainly no expert, bu in both of the National Replay Clinics I've attended, it was clear that the use of "egregious error" to review a play that is otherwise not reviewable should be used very very sparingly. The TD that was allowed after a fair catch signal a couple of years ago was, I believe, the impetus for the rule. Some of the examples given at replay clinics include allowing the clock to run for a minute or so when it should have been stopped, missing a spot by 7 or more yards (though I don't see how that would happen), and, of course, allowing a score after a fair catch signal. I would not have reviewed the play in question under the category of egregious errors. This one should have been corrected on the field; sometimes Replay cannot save the officials from themselves.