As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE GROUND TEST OF THE HYDRAULIC SYSTEM, THE HYD TEST BUTTON ON THE LOWER CONSOLE WAS DEPRESSED AND THE CHECK INITIATED. THE COLLECTIVE LOCKING DEVICE DISENGAGED AND THE AIRCRAFT BECAME AIRBORNE. AIRCRAFT CONTROL WAS REESTABLISHED AND AIRCRAFT WAS LANDED. ON SHUTDOWN VEMD SHOWED OVER LIMIT DETECTED. VEMD SHOWED OVERTORQUE OF 110 FOR 17 SECONDS.