What was found
REFUELER REPORTED BOTH QTY INDICATOR DROPPED RAPIDLY AFTER COMPLETING REFUEL. ACFT GROUNDED. PERFORMED A FQIS OPS TEST IAW AMM 28-41-00-710-801. FOUND COMPENSATOR DATA BAD ON BOTH MAIN TANKS. PERFORMED A TANK AND COMPENSATOR UNITS TEST IAW AMM 28-41-21-710-801. FOUND THE COMPENSATOR AND TANK UNIT NR 1 OF BOTH TANK NR 1 AND NR 2 WERE OUT OF LIMITS. REPLACED THE NR 1 TANK COMPARTMENT PROBE AND NR 1 TANK UNIT IAW AMM 28-41-21. REPLACED THE NR 2 TANK COMP PROBE AND NR 1 TANK UNIT IAW AMM 28-41-21. REFERENCE TASK CARD 800-28EA-16443-1 FOR ACCESS PANEL OPENING/CLOSING, AND PLT DEFERRAL FOR THE PANEL RE-TORQUES. THE FQIS NOW CHECKS GOOD IAW TEST AMM 28-41-00-730-801. FQIS COMPARISON CHECK/GROUND ETOPS VERIFICATION COMPLETED IAW AMM 28-41-00-720-801.