Many thanks to those who have posted fuel tank and fuel switch diagrams. I have questions about operating detail:
Several pilots on this thread have said they leave the XFR pumps running, and if I were I a pilot I think I'd do the same, though someone ought to tell the guys in the design labs that they need to design/test/certify for this mode of operation. At least one pilot has mentioned the need to juggle with the pump switches, or simply leave them switched off, when in orbit about a task.
So what is the standard procedure, please? Do the switches have to be manipulated all the time, or is there any gravity feed when the main tank is full? If "all the time" I guess that would be a few minutes out of every twenty minutes?
What I'm getting at here is that the gauges, annunciators and switches would have been operating properly throughout the flight with several successful fuel transfers taking place. Would the final fuel transfer at low main tank level have been any different?