What was found
DFW - FLT 3503 - WHILE IN CILMB-OUT FROM DFW, THE NR 2 PROPELLER SINGLE CHANNEL PE FAULT LIGHT ILLUMINATED WITH AN ASSOCIATED TORQUE SURGE. THE AIRCRAFT WAS RETURNED TO DFW DUE TO CONTINUOUS SURGING FROM THE PROPELLER. THE AIRCRAFT WAS RETURNED WITH NO FURTHER INCIDENTS REPORTED. MAINTENANCE REMOVED AND REPLACED THE PROPELLER ELECTRONIC CONTROL AND THE ENGINE ELECTRONIC CONTROL IAW ATR MM. OPS CHECK WAS GOOD AND AIRCRAFT WS RELEASED FOR A FUNCTIONAL CHECK FLIGHT. FCF WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. REF SIMA20011393. (M)