Squawk-7600, quotes...
Yesterday:
"Chris I'd suggest you're speaking of a bygone era. I can honestly say I've never had to dick around with the refuelling system of any modern jet I've flown. I have no idea of how it works on the 787, but I can pretty much guarantee it's all fully automatic."
Today (1):
"Yes a failure of a valve/electronics associated with the fuel system would make sense."
Quite: that's when you may have to "dick around" with the system, and that's when it's all too easy to make a mistake.
Today (2):
" 'Operator error' on the other hand does not [make sense]."
Joint effort, perhaps?