As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE OIL QUANTITY INDICATION FOR THE NR 1 ENGINE WENT TO ZERO AND OIL PRESSURE DROPPED. THE ENGINE WAS SHUT DOWN PER COM AND THE AIRCRAFT RETURNED TO NRT. MAINTENANCE INSPECTED THE ENGINE AND FOUND A BROKEN DIFFUSER CASE BOSS. REPLACED THE NR 1 ENGINE.