When a plane flies in frosting conditions, the nacelle and wings can be covered with white frost. There can even be accumulation of ice on the leading edges.
This accumulation of ice typically deteriorates the wing aerodynamic performances, in addition to increasing the aircraft’s weight, which is particularly detrimental to the aircraft’s performances and safety. It is therefore necessary to remove this ice or to prevent ice accretion.
The airframe anti-icing system carries hot air supplied by the engine bleed air system and blows it along the ice-sensitive parts of the airframe (engine nacelle air intakes, wing and tail leading edge).
An airframe anti-icing system is made up of pressure regulating valves, temperature sensors, pressure sensors, high pressure ducting, overheat / hot air leak detection devices and controller.