§25.929 Propeller de-icing

(See AMC 25.929) (a) If certification for flight in icing conditions is sought, there must be a means to prevent or remove hazardous ice accumulations that could form in the icing conditions defined in Appendices C and O on propellers or on accessories where ice accumulation would jeopardise engine performance (see AMC 25.929(a)). (b) If combustible fluid is used for propeller de-icing, CS 25.1181 to CS 25.1185 and CS 25.1189 apply.