What was found
AUTOFEATHER/IFSD DEPARTING AIRPORT, THE CREW EXPERIENCED AN UNCOMMANDED PROPELLER FEATHERING OF THE ENGINE AT TAKEOFF POWER. THE PILOT FOLLOWED EMERGENCY PROCEDURES AND SHUT THE ENGINE DOWN BEFORE RETURNING TO THE DEPARTURE AIRPORT WHERE AN UNEVENTFUL SINGLE ENGINE LANDING WAS MADE. TROUBLESHOOTING IS ON-GOING. MFG WILL INVESTIGATE TO ESTABLISH ROOT CAUSE AND SUPPLEMENT THE REPORT ONCE THE INFORMATION IS AVAILABLE.