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There is nice SUPP GND WING ANTI-ICE test in after start checklist. But then I started to think how does this system work? There is not much information about 650 pneumatics available, from Smartcockpit website good docs about Challenger 605 can be obtained. But 605 does not seems to have this panel. I tried to play with these switches and watched bleed simulation panel at the same time and found no direct connection. Just curios - for which purpose this this system is there and how it works?

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The supplemental ground wing anti-ice system provides a limited amount of bleed air to the wing leading edge, when the aircraft is on the ground, to maintain an ice-free leading edge by maintaining a surface temperature between 70°F (21°C) and 88°F (31°C).

The system is automatically activated when all of the following conditions are met:
• The aircraft is on the ground
• Both thrust levers are at, or near, the idle position
• The thrust reversers are stowed
• Both ANTI-ICE–COWL switches are selected ON
• The SYS (OFF) switch on the SUPP GND WING ANTI-ICE panel is not pressed in

Edited by Pils
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