As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE TAKEOFF ROLL THE AIRCRAFT LOST POWER DUE TO UN-COMMANDED FEATHERING OF THE PROPELLER. THE TAKEOFF WAS ABORTED. AFTER TROUBLESHOOTING THE MECHANIC FOUND A WORN BATA BRUSH THE PART WAS REPLACED. THE SYSTEM CHECKED GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.