Chapter 6.30 - Anti-ice, Rain

Question 1

Does the engine bleed valve switch need to be ON in order to use engine anti-ice?

Answer 1

No, the engine anti-ice is taken upstream of the engine bleed air valve

Question 2

What is indicated by a bright blue COWL VALVE OPEN light?

What does an amber COWL ANTI-ICE light indicate?

Answer 2

The cowl anti-ice valve failed to move to selected position

There is excessive pressure in the cowl anti-ice duct

Question 3

What devices are protected by the wing anti-ice system?

Answer 3

The three inboard leading edge slats

Question 4

On the ground, with the WING ANTI-ICE switch ON when will the valves open?

What occurs at lift-off if the WING ANTI-ICE switch is in the ON position?

Answer 4

• Thrust on both engines is below the setting for takeoff warning activation, and
• No duct overheat is detected

The switch trips OFF

Question 5

What is indicated by a bright blue L(R) VALVE OPEN light?

Answer 5

The wing anti-ice valve failed to move to selected position

Question 6

What will cause an amber window OVERHEAT light to illuminate?

Answer 6

• Overheat, or

- Loss of power