As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 1 ENGINE AUTO SHUTDOWN WHILE CRUISING AT FL 330 EN ROUTE. THE FLIGHT PROCEEDED TO SFO WHERE IT LANDED WITHOUT INCIDENT. THE NR 1 ENGINE WAS REMOVED AND REPLACED, A POWER ASSURANCE RUN WAS PERFORMED AND OPERATION CHECKED GOOD. *S/D* TEARDOWN FINDINGS REVEALED THE PRIMARY CAUSE OF ENGINE SHUTDOWN WAS DUE TO INLET GEARBOX DUPLEX BEARING FAILURE.