What was found
NR 1 MAIN FUEL TANK FAILS FQIS SYSTEM TEST, IAW AMM 28-41-00-730-801. ACFT GROUNDED. ACCOMPLISHED NR 1 FUEL TANK FQIS TANK AND COMP UNIT TEST IAW AMM 28-41-21-710-801. FOUND TANKS UNITS F1, F2, F6 AND F10 TO BE OUT OF LIMITS. REMOVED NR 1 MAIN FUEL TANK WING ACCESS PANES 532AB, 532BB, 532FB AND 532MB IAW AMM 28-11-11-000-801. REMOVED AND REPLACED NR 1 MAIN FUEL TANK FQIS TANK UNITS F1, F2, F6 AND F10 IAW AMM 28-41-21. REINSTALLED NR 1 MAIN FUEL TANK WING ACCESS PANELS 532AB, 532BB, 532FB AND 532MB IAW AMM 28-11-11-400-801. LEAK CHECK OK. REACCOMPLISHED NR 1 MAIN FUEL TANK FQIS COMPENSATOR AND TANK UNIT TEST IAW AMM 28-41-21-710-801. OPS CHECK NORMAL. ACCOMPLISHED FQIS SYSTEM TEST IAW AMM 28-41-00-730-801. OPS CHECKED NORMAL. ALL VALUES WITHIN LIMITS.