As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE, THE NR 1 ENGINE STALLED AND IFSD WAS ACCOMPLISHED. RESTART WAS ATTEMPTED, BUT FAILED. CREW FOLLOWED COCKPIT OPERATING PROCEDURE AND RETURNED TO NRT. VISUAL INSPECTION REVEALED METAL IN THE TAILPIPE AND A 6TH STAGE TURBINE DAMAGE. REPLACED NR 1 ENGINE AND CHECK WAS NORMAL.