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Engine Switches & Lights
Switch - Open cowl Anti-Ice valve on the associated Engine, if running, allowing Engine Bleed Air
to flow to the inlet cowl.
Valve Light - Indicate that position of the cowl valve disagrees with the position of the associated switch.
Wing Valve Lights
Indicate that position of the associated wing Anti-Ice valve disagrees with the position of the Wing Anti-Ice switch.
Wing Switch
Opens both left and right Wing Anti-Ice valves in flight, allowing Pneumatic system air to flow to the three leading edge
slats immediately outboard of the engine on each Wing.