As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) #1 ENGINE VIBRATION, LOW AND HIGH SPEED ROTOR INDICATION STAYED AT 3.0 UNITS FROM BEGINNING OF FLIGHT. LOOP B ON DEVIATION AND LOOP A FULL RED, ENGINE SHUT DOWN. DISCHARGED BOTH FIRE EXTINGUISHER BOTTLES, AND AIRCRAFT RETURNED TO LAND SAFELY.