As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE L FUEL QUANTITY TOTAL FUEL QUANTITY WOULD BLANK INTERMITTENTLY. GROUNDED - YES. PERFORMED B737-800 FIM TASK 28-41 TASK 813 FOR FUEL QUANTITY INDICATION BLANK NO DEFECTS NOTED. INTERMITTENT FAULT. PERFORMED FQIS BITE PROCEDURE PER FIM 28-41 TASK 801 NO FAULT IN CURRENT STATUS. PERFORMED GROUND TEST TEST PASSED DEFECT HAS NO HISTORY. A/C OK FOR SVC AT THIS TIME.