Anti-ice measures on a turboprop Twin Commander protect lots more equipment than the windshield, pitot static probes, and engine inlets. Generator inlets and the rudder trim tab are protected by thermostatically controlled heated rubber boots. The fuel vent tubes are wrapped in a heated metal foil. And, the top of the horizontal stabilizer and bottom of the rudder horn have heated metal plates.
It’s important to make sure all of these components are in good condition and working properly before venturing into known icing. Generator inlets, for example, are located on the engine nacelle directly behind the prop and therefore subject to significant erosion. Fuel vent tubes are exposed to the slipstream and also suffer from erosion. The rudder trim tab and upper and lower rudder plates protect these surfaces from accumulation of ice between very closely spaced surfaces.
Checking and testing anti-ice components is best done by a Twin Commander-authorized service center, and not just because some of the components—the upper and lower rudder plates—are difficult to reach. Service centers are trained and equipped to test the components properly using the right tools and methods. Plus, they have access to improved versions of some of the components that have been developed recently by Twin Commander Aircraft LLC.
For more information about anti-ice components on your Twin Commander, contact your authorized Twin Commander Service Center.
