As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT MAIN FUEL TANK QTY WENT BLANK TWICE FOR A MINUTE OR SO WITH 8.55 IN THE TANK AND 2.0 IN THE CTR TANK, BUT READ NORMAL FOR THE LAST 2 1/2 HOURS OF THE FLIGHT. ACFT GROUNDED. PERFORMED FQIS BITE. NO CURRENT FAULTS BUT IN FLIGHT HISTORY FOR LAST 6 FLIGHTS SHOWED MAINT MESSAGE PROCESSOR FAILED. REMOVED AND REPLACED FUEL QUANTITY PROCESSOR UNIT DUE TO HISTORY. OPS TEST GOOD IAW FIM 28-41, TASK 813.