As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LEFT ENGINE VIBRATION. CREW THROTTLED BACK LT ENGINE TO FLT IDLE. VIBRATION INDICATION WAS STABLE AT .8 AND VIBRATION MESSAGE EXTINGUISHED. THE CREW DID NOT SECURE THE ENGINE AND DIVERTED TO ITO. EMERGENCY EQUIPMENT WAS DISPATCHED. THE LANDING WAS UNEVENTFUL. MX IN WORK ON LEFT ENGINE REPLACEMENT.