What was found
ETOPS - FUEL LEAK AT AFT DRAIN MAST. FOUND DURING REFUELING. FUEL LEAK ACTIVE ONLY DURING REFUELING. FOUND FUEL LEAK COMING FROM AFT PART OF DRAIN MAST. PERFORMED AMM 28-27-48-801-A UP TO STEP 5. FOUND TRIM TANK TRANSFER PUMP TO BE OPERATIONAL. NO DEFECTED NOTED. PER TSM 28-14-00-810-801-A, PERFORMED LEAK TEST OF TRIM TRANSFER VALVE PER AMM 28-27-00-790-804 STEP 1.4.A(C). FOUND PACKINGS FOR 5706QA HOSE WORN. REMOVED AND REPLACED PACKINGS. CONDITION SAME. REMOVED AND REPLACED TRIM PIPE INSULATOR REF AMM 28-27-47. OPS/LEAK CHK GOOD. NO LEAKS NOTED. OK FOR SVC.