As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN LEFT FUEL FEEDER TANK IS DRAINED COMPLETELY, RIGHT FUEL FEEDER TANK DROPS TO ZERO (QUANTITY INDICATOR). WHEN YOU PULL LEFT FUEL FEEDER TANK CIRCUIT BREAKER THE LEFT FUEL QUANTITY GOES TO RED X AS IT SHOULD AND RIGHT FUEL QUANTITY INDICTOR DROPS TO ZERO. IT WAS FOUND TO BE A SOFTWARE PROBLEM IN THE EEI (ELECTRONIC ENGINE DISPLAY)