The pilot has not responded and tried to land after 2 red low fuel warnings. Why? He may be unaware that the transfer fuel pumps are off. and is seeing the main tank still displaying adequate fuel levels. Did the display of the supply tanks fuel level somehow reset to zero because of a (sensor) failure that then made the pilot focus on the main tank display which gave him total comfort, and he thus deliberately ignored the supply tank display. The pilot then ignored the subsequent red low fuel warnings as being also erroneous as they were linked to the supply tanks display showing zero fuel. The pilot was rational and acted rationally at least in his own mind. Is there any way that the supply tank fuel display can reset to zero during a flight?