As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TROUBLESHOOTING OF THE FUEL QTY INDICATING SYS FOR A CALIBRATION DEFECT. THE ACFT WAS SUBSEQUENTLY DEFUELED AND THE AME NOTICED THAT THERE WAS NO LOW FUEL LIGHT INDICATION ON THE MASTER CAUTION PANEL. THE PRESS TO TEST FUNCTION FOR THE FUEL LOW LIGHT WAS FOUND OPERATIONAL. REPLACING THE MASTER CAUTION PANEL RECTIFIED THIS DEFECT. THIS DEFECT WAS NOT KNOWN UNTIL THE ACFT WAS DEFUELED.