Jim is not correct. It was due to FAA regs. Augmented F/A staffing is required for long haul flights when a duty period is scheduled to be more than 14 hours. See FAR 121.467(B)(4), (5) and (6):
http://www.airweb.faa.gov/Regulatory_and_G...ghlight=121.467
As I understand it, here, some of the F/As reassigned to the NRT flight had checked in many hours before that flight's departure to work another flight. When they were reassigned to the NRT flight, at least one must have had a projected duty time of over 18 or 20 hours, which triggered the augmented staffing requirements. Once UA realized what happened a couple of hours into the flight, it contacted the FAA to get some sort of one-time / self-reporting / "oops, mea culpa, honest mistake" waiver. The FAA denied the request, necessitating the return to IAD.
Bear my hats off to you. This was great information and totally clarifies the 1/50 rule. And my hats off to the reserve for knowing her stuff. Most reserves I know are usually well informed. It's always smart to confer with our colleagues on sticky policies and procedures REGARDLESS of where they fall on the seniority list. Once again, great post!
