Pennsylvania-based Innovative Solutions & Support (IS&S) has received FAA STC approval for its non-Fadec turboprop autothrottle for the Pilatus PC-12. According to the systems integrator, the retrofit allows pilots to automatically control power settings of the PT6 engine to prevent overtorque and over-temperature conditions while providing speed-envelope protection.
The autothrottle computes and controls the appropriate power levels and features an automatic takeoff and go-around (TOGA) mode that will bring the engine to max power in a few seconds. Other modes allow the pilot to select the desired torque or airspeed, and if those manual settings approach limits in either parameter, the system will respond with a built-in throttle handle shaker.
IS&S plans to pursue further STCs for other PT6-powered aircraft, a category that includes more than 25 different aircraft types and 13,000 tail numbers.