747 Anti Ice & Ice/Rain Controls
by jerome meriweather

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Anti Ice and Window Washers WindShield Washer Switches Wiper Selectors Window HEAT Switches Rain REP Switches Wing Anti-Ice Switch Nacelle Anti-Ice Switches
747 Photo and/or Graphic Element



Nacelle Anti-Ice Switches (1, 2, 3, 4)
The valve on the associated engine opens if bleed air pressure is available. Opens Pressure Regulating Valve (PRV) unless PRV has been closed by:
Wing Anti-Ice Switch
In flight, opens left and right wing Anti-Ice valves when bleed air pressure is available to supply bleed air to the wing leading edges:
Ice & Rain Controls
Spray a timed application of Rain repellent on the associated forward windshield.
Window HEAT Switches
Turn on controlled Anti-Ice and defogging heat to the associated window.
Wiper Selectors
WindShield Washer Switches