What was found
(CAN) AN OPERATOR CARRIED OUT AN UNSCHEDULED LANDING DUE TO UNCOMMANDED NR 2 PROPELLER FEATHER DURING CLIMB, AND SUBSEQUENT OVERTORQUE OF THE NR 2 ENGINE. THEY FOUND THE CAUSE OF THIS PROBLEM WAS: CHAFING OF SEVERAL WIRES (HYDRAULIC SYSTEM, PROPELLER AUTOFEATHER SYSTEM, AND GALLEY ELECTRICAL POWER) ON A BRACKET IN THE RT WINGROOT CAUSED A 'MIXTURE' OF 28VDC AND 115VAC IN THESE SYSTEM, AND SUBSEQUENT MALFUNCTION OF THE NR 2 PROP AUTOFEATHER SYSTEM. THE AFFECTED BRACKET IN THE RT REAR WINGROOT HAS P/N 85350711-001.