As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB AND CRUISE. FUEL TOTALIZER ON THE FMC PROGRESS PAGE BECAME ERATIC WITH FUEL TOTALS DROPPING UP TO 600 POUNDS AND THEN CLIMBING UP 500-600 POUNDS ON THE LANDING TOTAL. GROUNDED - YES. ACCOMPLISHEDB737-900 FIM 28-41 TASK 814 SUMP FUEL TANKS, NO WATER FOUND. PERFORMED FQIS BITE TEST, GROUND TEST PASS, FUEL INDICATION IS CORRECT.