What was found
DURING CRUISE LVL2 ALERT FUEL QTY/USED CHECK. CREW PERFORMED QRH PROCEDURE AND DETERMINE A 4000 LB POTENTIAL LOSS OF FUEL. PRIOR TO DECENT IT INCREASED TO 5000 LBS AND AT BLOCK IN IT WAS 6000 LBS. RAN ALL ENG FOR COFIRM FUEL USED FOR 30 MIN 85% N1 PER MD-11 JRH. FOUND 3000 LBS FUEL LOSS. REMOVED AND REPLACED SEM PER MM 28-41-92-4. PERFORMED FUEL QTY IND TEST PER MM 28-41-00-5. NO DEFECTS NOTED. RAN ALL ENG AGAIN PER MD11 JRH FOR 15 MIN. FOUND NO LOSS OF FUEL. A/C OK FOR SERVICE.