As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN TANK NR 1 AND FUEL TOTAL INDICATORS BLANKED OFF FOR APPROXIMATELY 3-5 SECONDS EVERY 20-30 MINUTES DURING LAST 4 HOURS OF FLIGHT. INDICATIONS ALWAYS RETURNED WITH CORRECT AMOUNTS. ACFT GROUNDED. COULD NOT DUPLICATE PROBLEM. PERFORMED OPS TEST OF FQIS IAW AMM 28-41-00-710-801. TEST PASS WITH NO FAULTS, OPS NORMAL.