There is no alert that I know of (yet to test that theory myself).
I don’t know the crew involved nor their rosters but worth mentioning from report:
The flight crew had recently completed their third sector for that day in a different aircraft and were required to change aircraft for this flight, which had a scheduled departure time of 2200 Eastern Standard Time (
Last minute aircraft swap, final fourth sector of probably a long day, pushing Sydney curfew for departure, EFB stuffing up so manual calcs, and no doubt they’re probably on max hours for the month during September peak period going from early morning sign ons to late nights...
I could be wrong, but it’s probably safe to say it the crew were probably not at their best by that stage of their duty...