As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE, NR 1 ENGINE NR AND NG AND MGT WENT HIGH, TORQUE AND NP SHOWED ZERO, REDUCED NR 1 THROTTLE AND PERFORMED CHECKLIST AND SHUT ENGINE DOWN. ROTOR RPM WENT TO 107 FOR 10 SECONDS. INSPECTED ENGINE AND REPLACED YELLOW ENGINE HARNESS AND ECU.