so yes, if there was some sort of blockage between the mains and supply tanks, I guess the pilot could be faced with contrary indications of enough fuel to get home (from the quantity transmitters in each tank) and low fuel (the low fuel sensors in the supply tanks). Is that covered in the training?
I thought given this issue:-
A spokesman for Eurocopter, a unit of European aerospace and defence company EADS, said tests by Bond and two other EC135 operators in Europe found possible similar supply-tank fuel gauging errors that overestimated the fuel on board.
"The first analysis shows that the indication of the fuel quantity in the supply tanks could be overestimated," the company said in a statement.
"All crews should be aware that in the worst case a red warning "Low Fuel" could appear without any amber FUEL Caution before."
If that affected the accident machine couldn't you foresee a situation where you just automatically take the first warning as the amber alarm and become unprepared?