As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 MAIN TANK FUEL QUANTITY INDICATION SYSTEM FAILS SYSTEM TEST IAW AMM TASK 28-41-00-730-801. GROUNDED - YES. PERFORMED TANK UNIT AND COMP TEST REF B737-800 AMM TASK 28-41-21-710-801. COMPENSATOR FAILS AT 60.58 PICO FARADS. ALL TANK UNITS READ GOOD. REMOVED AND REPLACED COMP UNIT REF AMM TASK 28-41-21-000/400-801 COMP UNIT TEST NOW GOOD.