AN ACR B747 FLC HAS THE #4 ENG FLAMEOUT WHEN THE SO TURNS THE BOOST PUMPS OFF WITH THE XFEED CLOSED. FLC WAS ABLE TO OBTAIN A RELIGHT AT 24000 FT AND RESUME THEIR FLT.

Narrative

#4 ENG FLAMED OUT DUE TO OPERATOR (FE) ERROR (#4 FORWARD AND AFT BOOST PUMPS OFF; #4 XFEED CLOSED). FE PREOCCUPIED WITH MANUAL CTL OF #3 PACK (AIR-CONDITIONING) -- DUE TO AUTO INOP; CLOSE CTL OF ENG EPR DUE TO XING RESTR OF 39000 FT AT NEW YORK AIRSPACE BOUNDARY AND FUEL CONFIGN CHANGES -- TANK TO ENG AT TKOF; #2 AND #3 TO ALL ENGS AT 21.5 #1 AND #4; BACK TO TANK TO ENG AT 1+1R = 24.8 = 2; 4+4R = 3 = 24.8. ENG DID NOT RESTART IMMEDIATELY USING NORMAL PROC; CAPT PLANNED TO RETURN TO SJU INSTEAD OF CONTINUING TO JFK; WAS SO CLRED AND DSNDED TO 24000 FT. AT 24000 FT; AFTER 3 UNSUCCESSFUL INFLT RESTART ATTEMPTS USING PUBLISHED PROC (#1 AND #2 IGNITERS ON NORMAL FLT START SWITCH); FE USED STANDBY PWR (WHICH FIRES #1 IGNITER) AND ENG RESTARTED. FLT PLAN WAS THEN RESUMED WITH CLRNC TO JFK AND OPERATED NORMALLY THEREAFTER. FIRST SUCH ERROR IN THIS FE'S CAREER SPANNING 36 YRS. SEVERAL DEVICES AVAILABLE ON LATER B747'S; AND FOR RETROFIT ON THIS B747-131 MODEL; WOULD HAVE HELPED: FULL FLT REGIME AUTOTHROTTLE SYS (FFRATS). BOOST PUMP WARNING SYS (PRESSURIZATION LIGHTS FLASH IF BOOST PUMPS OFF AND XFEED VALVE CLOSED FOR SAME ENG). DOUBLE BACKED CHK VALVES IN MIDDLE OF XFEED MANIFOLD TO MINIMIZE FUEL UNBALANCE. PERFORMANCE DATA COMPUTER; SHOWING TOP OF CLB POINT FOR DIFFERENT WTS; ALTS; TEMPS. THE FE IS CONCERNED THAT THE IGNITERS ON THE NORMAL FLT START SWITCH DID NOT RELIGHT THE ENG; BUT THAT THE STANDBY PWR SWITCH; NOT SPECIFICALLY MENTIONED IN THE RESTART PROC; DID 'SAVE THE DAY.' GND START AT SJU 20 MINS EARLIER (USING SAME IGNITERS AND ELECTRICAL BUSES) WAS NORMAL. ALL BUSES REMAINED POWERED AT ALL TIMES THROUGH THE FLT. THE STANDBY INVERTER APPARENTLY PROVIDED A SLIGHTLY BETTER SPARK TO THE #1 IGNITER; RESULTING IN A SUCCESSFUL RESTART AT 24000 FT WHEN THE NORMAL AC PWR SOURCES DID NOT DO SO.