Oddly, our organization (B1900) has had a couple in the past few months. One fellow reported the ailerons to be "stiff" in all phases of flight, with the yoke well out of neutral to keep the wings level. Inspection revealed the cable on one side had completely departed the pulley.
A more serious incident happened a bit later. After a very windy day (40kt gusts) without the rudder lock installed, the aircraft departed. The captain applied just a bit of rudder application prior to YD engagement, and his foot went all the way to the floor, without any resistance or aircraft response. Came back around and landed without a problem. A large bellcrank thingy under the cokcpit floor in the rudder control circuit had broken, leaving the crew with zero rudder control. In a straight wing airplane, not the end of the world as long as Pratt & Whitney keep their promise. A serious debacle if an engine packs it in. Later inspection revealed that another aircraft had the exact same problem that day, but was discovered prior to it's departure.