What was found
NR 2 MAIN TANK FUEL INDICATION UNRELIABLE. INDICATION SLOW DECREASE UNTIL STABILIZING AT 7,450, 1050 LOW, WHILE DRAWING FUEL FROM ONLY THE CENTER TANK. ONCE STARTED FEEDING TANK TO ENGINE, NR 2 READ APPROXIMATELY 600 ACCORDING FUEL LOGS. ACFT GROUNDED. FOUND WATER CONTAMINATION IN COMPENSATOR UNIT AND FAULTS 28-41203. REPLACED NR 2 MAIN TANK COMPENSATOR UNIT. FQIS SYS TEST NORMAL REF AMM 28-41-00-730-801 AND COMPENSATOR INSTALLATION REF AMM 28-41-21. ACCESS PANEL LEAKS CHECKED GOOD REF AMM. 28-11-11.