What was found
NOTICED EXCESSIVE FUEL BURN ON THREE CONSECUTIVE WAYPOINTS, SHORTLY THEREAFTER RECIEVED A LEVEL 2 FUEL QTY USED CHECK, POSSIBLE FUEL LEAK. RAN QRH PRCEDURE AND THE NR 2 TANK OR ENGINE ISOLATED AS SOURCE OF LEAK. FURTHER TROUBLESHOOTING DETERMINED IT WAS THE NR 2 ENGINE. SHUTDOWN THE NR 2 ENGINE IAW QRH. VISUALLY INSPECTED THE FUEL LINE & FOUND THE ELBOW CRACKED. THE ELBOW WAS REMOVED AND REPLACED IAW AMM 28-21-01-4. TESTED OK, ACFT OK FOR SERVICE.