What was found
PDIS 597 28-41 3303 18SEP20 MEM OPEN U. APPROX 150 MILES OUT OF KMEM RECEIVED TNK 1 TIP TRAPPED AND TNK 1 FUEL QTY LO LEVEL 1 ALERTS. SHOWED 5700 LBS OF FUEL TRAPPED IN NR 1 TIP TANK. 23.0K TOTAL FUEL. DECLARED EMERGENCY DIRECT TO KMEM. ENROUTE LAT FUEL UNBAL LEVEL 2 ALERT. WENT TO FUEL MANUAL KEPT FUEL IN NR 2 & NR 3 TANKS. INSPECTED NR 1 MAIN TIP TANK AND FOUND DEBRIS IN TRANSFER VALVE, REMOVED DEBRIS. REMOVED AND REPLACED TRANSFER VALVE, PER AMM MD11-28-21-04-4. OPS CK IS GOOD.