What was found
FUEL IMBALANCE MAIN 2 MAIN 3. MAIN 2 13,000LBS MORE THAN MAIN 3. RAN QRH. PERFORMED M2/M3 FUEL MANIFOLD LEAK TEST IAW B747 FIM 28-20 TASK SUPPORT. M2/M3 FUEL MANIFOLD LEAK TEST NOTED 200LBS/4 MIN LEFT CUT MANIFOLD LEAK TEST NOTED 100LBS/4 MIN M2 REFUEL/JETT LEAK TEST NOTED 100LBS/3 MIN. PERFORMED FUEL CMD OVRD M3 STATUS CHECKS IAW FIM 28-31-00-872. ALL CHECKS GOOD, FUEL MANIFOLD LEAKS NOTED ABOVE ARE THE ONLY DEFECTS NOTED. FUEL MANIFOLD LEAK RATE OUT OF LIMITS. REMOVED & INSTALLED NEW SERVICEABLE C/T LT SIDE SCAVENGE FUEL LINE IAW AMM 28-15-03. OPS CHECKS GOOD IAW AMM 28-15-00. NO DEFECTS NOTED.