A friend in the USA has sent me the
current FAA requirements in relation to “minimum fuel” and declaring a “fuel emergency”. Note that there is no mention of the word “Mayday”.
I wonder if this is just another case where the US will be notifying a difference with ICAO. I understand the USA has filed more differences with ICAO than any other country. Once a senior FAA staffer said:
“Dick, if we complied with all of the ICAO requirements there would not be a viable aviation industry in the USA.”