What was found
NR 2 FUEL TANK QUANTITY DROPPED TO 8300 LBS FROM 8700 LBS SHORTLY AFTER FUELING WAS COMPLETED ON THE RAMP. AFTER APPROX 1.5 HOURS OF FLYING THE NR 2 TANK INDICATED 8700 LBS, THE SAME AS NR 1 TANK. LATER, NR 2 TANK AGAIN INDICATED 8300 LBS. 400LB DIFFERENCE REMAINED THROUGH THE REMAINDER OF FLIGHT. PERFORMED FIM 28-41, TASK 801, CURRENT STATUS BITE AND GROUND TEST BOTH FAIL WITH FAULTS TANK 1 DEGRADE ACC ATA 28-41108 COMPENSATOR DATA BAD AND TANK 2 DEGRAD ACC ATA 28-41208 COMPENSATOR DATA BAD. FQIS IN FLT FAULTS SHOW SAME FAULTS LAST 25 FLTS, EITHER TANK OR BOTH FAULTED DURING FLT. EMPTIED NR 1 AND NR 2 MAIN FUEL TANKS & SUMPED REMAINING FUEL & FOUND CONTAMINATION - FILLED AGAIN & SUMPED AGAIN TIL CLEAR, REF FIM 28-41 TASK 807. DRY CAPACITANCE CK IS GOOD REF MM 28-41-00-730-801. NOW OPS NORMAL REF FIM 28-41 TASK 801 CURRENT STATUS & GROUND TEST NORMAL.