The engine system components and parts used to eliminate and prevent the formation of ice. Includes the control valve and associated actuator, switch and circuitry which controls the flow of turbine engine compressor bleed air to the engine anti-icing system. Anti-icing reports pertaining to the powerplant cowling are filed in JASC code 3020. Typical parts are control valve, actuator, motor, switch, relay, circuit breaker, hose, manifold, coupling, fuel heat duct, fuel heat valve, etc.