Originally Posted by
The Situation
Also could be a mechanical issue that prevents filling the fuel tanks. Also would explain choosing SLC for the stop in case they need to do an aircraft swap (although there aren't a lot of other logical stops along the way except for BOI).
I'm going with this (mechanical). There's some mechanical issue with the plane which reduces it's range -- but it's still allowed to fly --- and they want to get it to SEA to fix it.