If you go to the upper left corner of the FAA website, there's a link to Accident and Incident data. Follow that link, then click "Preliminary Accident and Incident Data". Right now, the data stops on August 31st, I assume because no one was updating it over the holiday weekend. If you wait a day or two, I'm sure something will turn up related to your mayday call. I'd be willing to bet that since there's no news about a crash at that time on the internet, the pilot made it down safely. I remember once on a cross country flight as a student, hearing someone with engine problems trying to make it to an airport to land. It's really an eerie feeling listening to that kind of thing while you're up there.