What was found
DUE TO 2 FUEL QTY EVENTS ON THE NR 1 TANK, MX CONTROL REQUEST A CHECK THE FQIS SYSTEM IN THE LEFT TANK TO PREVENT POTENTIAL INCORRECT FUEL QTY READINGS. GROUNDED - YES. FOUND PROBES F4, F6, F7, F9, AND COMP PROBE BAD. ALL OTHER PROBES WITHIN LIMITS. WHILE CONFIRMING PROBE VALUES FOUND TU 3 OUT OF LIMITS REF AMM 28-41-21-710-801. REPLACED TANK UNITS 3, 4, 6, 7, 9, AND THE COMP PROBE PER AMM 28-41-21/401. TESTS GOOD PER SAME AS WELL AS ON A TANK AND COMPENSATOR UNITS TEST PER AMM 28-41-21-710-801.