As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1511, AIRCRAFT EXPERIENCED NR 1 ENGINE ROLLBACK WITH 9.9 N1 VIBRATION WHILE EN ROUTE. CREW DECLARED AN EMERGENCY AND THE FLIGHT WAS DIVERTED TO BNA. MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE. VENDOR REPORT IDENTIFIED 3RD STAGE LPT BLADE SET WITH SEVERAL BROKEN BLADES.