Patent ID: 7975966

Claim:
An aircraft icing protection system comprising a primary icing protection system to provide icing protection to an airframe structure, and a secondary icing protection system to provide icing protection to an air scoop of the aircraft, wherein the primary icing protection system comprises, a heated air chamber; and a supply conduit for supplying heated air from a source thereof to the heated air chamber such that heat of the heated air within the heated air chamber is transferred to the airframe structure to provide icing protection thereto; and wherein the secondary icing protection system comprises, an air duct connected to the air scoop having air inlet and outlet openings; a fairing which covers the air duct and defines an interior fairing space in which at least a forward portion of the air duct is positioned, the fairing having a forward end which surrounds the air inlet of the air duct; at least one tube having an inlet end in communication with the heated air chamber of the primary icing protection system and an outlet end in communication with the interior fairing space of the secondary icing protection system, wherein air containing residual heat that remains in the heated chamber of the primary icing protection system is directed through the tube to the interior fairing space so that the residual heat thereof is transferred to the air duct and thereby provide icing protection to the air scoop.