What was found
MAIN TANKS AUTO SHUTOFF AT 8360 IN NR 1 TANK AND 8230 IN NR 2 TANK - BOTH LESS THAN FULL. ACFT GROUNDED. PERFORMED SYSTEM TEST OF FQIS AND FOUND #2 FUEL TANK UNIT CAPACITANCE OUT OF TOLERANCE, REF B737-800 AMM 28-41-00-730-801. TANK AND COMPENSATOR UNIT TEST ACCOMPLISHED, REF B737-800 AMM 28-41-21-710-801: COMPENSATOR PROBE AND TANK UNIT #1 OUT OF LIMITS IN #2 FUEL TANK. COMPENSATOR PROBE AND TANK UNIT NR 1 REMOVED AND REPLACED, REF B737-800 AMM 28-41-21. OPERATIONAL CHECK OF #2 TANK FQIS GOOD, REF B737-800 AMM 28-41-00-730-801. REFUEL QUANTITY INDICATOR OPERATIONAL TEST DONE, REF B737-800 AMM 28-41-61-400-801 STEP H. OPS CHECK GOOD.