What was found
GOT A FUEL QTY, USED CHK ALERT AT FL 380 . FOLLOWING QRH IT APPEARED THAT WE HAD LOST APPROX 5000 LBS OF FUEL . FOLLOWING CHK IT SEEMED LEAK WAS COMING FROM NR 2 TANK OR ENG . ISOLATED TANK , IT WASN`T LEAKING . BURN TO NR 2 WAS MUCH HIGHER THAN NR 1, AND 3 . CHECK LIST HAD US SHUT DOWN NR 2 ENG . LANDED UNEVENTFULLY . NOT MISSING ANY FUEL AND NR 2 TANK HAD INCREASED 1000 TO 5000 LBS THAN WHEN AIRBORNE . TANK NR 2 FUEL TANK SYNOPTIC QTY DISPLAY- INOPERATIVE. FUEL TO KNOWN QTY, AND AFTER REFUELING, VERIFY TANK NR 2 QTY WI TH FUEL LEVEL STICKS AND RECORD IN THE AML/EAML. OPE RATE FSC IN MANUAL. OPS NOT AUTHORIZED ABOVE 78 N LA T. TAIL FUEL MGMT - INOP." REF TSI 28-41-2974 FOR T/S. REMOVED AND REPLACED SEM IN IAW AMM 28-41-91-4, NO FAULTS AT THIS TIME, OPS CHECKED GOOD, ACFT OK FOR SERVICE.