As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THROTTLE FROZEN AT CRUISE POWER WHEN HELICOPTER CLIMBED THROUGH FREEING LEVEL AT APPROXIMATE 3,000'. THE CABLE BECAME UNSTUCK WHEN THE HELICOPTER RETURNED TO A LOWER LEVEL. BY THIS TIME THE PILOT (FLIGHT INSTRUCTOR) CARRIED OUT AN AUTO ROTATION TO ABBOTSFORD AIRPORT AND HOVER TAXIED BACK TO THE HANGAR.