As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE VIBRATION, RTFL. LEFT ENGINE, SHORTLY AFTER TAKEOFF ALL ENG PARAMETERS DECREASED AND ENGINE SHUTDOWN. RETURNED TO DEPARTURE. ON ARRIVAL AT GATE, NO EXTERNAL LEAKS, MAIN CHIP DETECTOR HAS METAL PARTICLES. REPLACED NR 1 ENGINE.