ACFT EQUIP PROBLEM.

Narrative

WHILE ENRTE FROM TDE-LAX AT FL350 THE FOLLOWING OCCURRED: THE FUEL SYNOPTIC WAS SELECTED ON THE SECONDARY EICAS SCREEN TO MONITOR THE CENTER TANK SCAVENGE PUMP OP. DURING THIS TIME THE SECONDARY ENG PARAMETERS 'POPPED UP' ON THE SECONDARY EICS. THIS WAS CAUSED BY THE #1 OIL QUANTITY DECREASING AT A HIGHER THAN NORMAL RATE AND THE QUANTITY TURNED TO MAGENTA AT 9 QUARTS REMAINING. OVER THE NEXT 15-20 MIN WE OBSERVED THE QUANTITY DROP TO 4 QUARTS AT WHICH TIME THE DECISION WAS MADE TO DIVERT TO NARITA INTL. WE ADVISED TOKYO CENTER VIA TOKYO RADIO OF THE NATURE OF OUR PROBLEM AND OUR DESIRE TO GO TO NRT. WE ALSO BEGAN REQUESTING FL290 WHICH THE HIGHEST ALT WE COULD MAINTAIN ON 3 ENGS. AS THE OIL QUANTITY FELL WE REDUCED ENG THRUST TO IDLE TO ALLOW ENG COOL DOWN PRIOR TO SHUT OFF. REQUEST FOR COURSE REVERSAL AND LOWER ALT WERE REPEATED. WHEN OIL QUANTITY INDICATED ZERO THE #1 ENG WAS SHUT DOWN AND ATC WAS ADVISED OF THIS ALONG WITH MORE REQUESTS FOR DSCNT. IN ADDITION; FUEL DUMPING WAS INITIATED AS THE AIRSPD DECAYED TOWARD THE YELLOW MIN ARC; WITH STILL NO DSCNT CLRNC; WE DECLARED AN EMER TURNED OFF TRACK TO THE N AND BEGAN A DSCNT TO FL290. ATC THEN GAVE US CLRNC TO FL290 AND BACK TO NRT. MAINT FOUND A BROKEN OIL PRESSURE LINE ON #1 ENG. IF ATC HAD PROVIDED PROMPTER ASSISTANCE IN THE FORM OF LOWER ALTS A DISRUPTION OF TFC COULD HAVE BEEN AVOIDED. EVEN AFTER THE EMER WAS DECLARED WITH NRT WX AT 200 FT AND 1600 METERS; ATC SANDWICHED AN ACFT INTO FINAL AHEAD OF US FOR RWY 34 WITH ONLY 2 MI SEPARATION SETTING UP A POTENTIAL 3 ENG MISSED APCH IN BAD WX. AS FOR THE OIL INDICATION; THE ADVANCED COCKPIT WDB WITH 4 ENGS HAS HAD AN INDICATION PROBLEM ON OIL QUANTITY FOR ENGS 3 AND 4 SINCE THE BEGINNING OF DELIVERY. AFTER START AND DEP THE OIL QUANTITY ON 3 AND 4 FALL FROM 20/24 QUARTS TO 9 AND SOMETIMES 5 QUARTS; CAUSING THE DISPLAY TO INDICATE MAGENTA QUANTITIES AND NEGATING THE ALERTING FUNCTION OF 'POP UP' AND COLOR CHANGE WHEN OIL QUANTITIES FALL. IF WE HAD BROKEN A LINE ON 3 OR 4 WE WOULD MOST LIKELY HAVE MISSED THE PROBLEM UNTIL THE ENG WAS SEVERELY DAMAGED. ACFT MANUFACTURER OR ENG MANUFACTURER NEED TO RECTIFY THIS PROBLEM ASAP.