As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN CABIN DURING REVENUE FLIGHT, CREW NOTED VIBRATION AND NOISE FROM LT ENGINE, FOLLOWED BY DETERIORATION OF ALL PARAMETERS AND AN IMMEDIATE SMELL OF SMOKE IN THE CABIN. THE CREW ELECTED TO SHUTDOWN THE ENGINE AND ACCOMPLISHED AN UNEVENTFUL SINGLE-ENGINE LANDING. TROUBLESHOOTING IS ONGOING.