What was found
(CAN) AT 600 FT ASL AFTER TAKE OFF, NR 2 TORQUE ROLLED BACK TO 30 - 40% THEN FUEL FLOW HAD FLUCTUATIONS AND THE PROP WENT TO FEATHER WITH AUTO FEATHER AND UPTRIM ON. NR 2 ENGINE WAS THEN SHUT DOWN AND AIRCRAFT RETURNED TO CYVR WITH NO OTHER INCIDENTS. ENGINE WAS INSPECTED AND FOUND NO OBVIOUS EXTERNAL DAMAGE ALSO EASE OF ROTATION VERIFIED. AIRCRAFT STARTED AND FOUND SLOW TO UNFEATHER THEN COULD NOT FEATHER AT ALL, ENGINE SHUT DOWN. TSCU REPLACED AND WIRE CHAFING ON NR 2 PCU FEATHER SOLENOID REPAIRED. AIRCRAFT GROUND RUNS CARRIED OUT AND OPERATION CHECKED SERVICEABLE. AIRCRAFT RETURNED TO SERVICE WITH NOT FURTHER FAULTS.