As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEAVY SMOKE IN THE COCKPIT, UNCOMMANDED COLLECTIVE AND CYCLIC INPUT LEADING TO EMERGENCY DESCENT AND POWER CONTROL VIA ENGINE THROTTLES. AUTOROTATIVE LANDING PERFORMED, AIRCRAFT WENT OFF RUNWAY AFTER LANDING. NTSB NOTIFIED PER 49 CFR 830. MORE DETAILS TO FOLLOW