8Pieced:
With the fuel sensor fault of GNWEM/GXMII, the supply tanks would show full at 90 kgs throughout. It is possible that the main tank sensors were affected also, I think they were probably ok, and in my scenario, even if the main tank sensors are working normally, the total fuel load at the point of LOW FUEL
But to be clear, for your theory to be feasible both supply tank fuel sensors would need to have suffered the same fault at the same time, correct?