What was found
NR 4 ENGINE FLAMED OUT IN DESCENT INTO PANC. ABMORMAL PROCEDURES COMPLIED WITH. ENGINE WOULD NOT RESTART, NR 4 THROTTLE/THRUST LEVER REMAINED LOCKED AT IDLE UNTIL AFTER LANDING. INSPECTED NR 4 ENGINE PER B747MM 71-00-41,71-00-42 (TROUBLESHOT). NO DEFECTS NOTED. CARRIED OUT FULL GAS PATH BORESCOPE INSPECTION AS PER B747MM 72-00-00, NO DEFECTS NOTED. PERFORMED VBV RIG CHECK PER B747MM 75-32-02, AND VSV RIG CHECK PER B747MM 75-31-03 NO DEFECTS NOTED, CABLES MOVE SMOOTHLY, NO BINDING. INSPECTED 8TH STAGE CHECK VALVE OPERATES SMOOTHLY. IDLE RAN ENGINE OP'S CHECK NORMAL PER B747MM 71-00-00 TEST B. CHANGED NR 4 MEC PER 73-21-01 AND NR 4 ENGINE MAIN FUEL PUMP PER B747MM 73-11-01 BOTH OP'S CHECK AND LEAK CHECKS GOOD PER B747MM 71-00-00 TEST 5.