Boeing 777 Anti Ice
Boeing 777 Anti Ice 15 Questions at a time (45 Questions Total)
1 / 15
What position should the WING ANTI-ICE selector be in for taxiing in icing conditions?
2 / 15
What position should the ENGINE ANTI-ICE selectors be in for taxiing in icing conditions?
3 / 15
When will the ANTI-ICE ON EICAS message be displayed?
4 / 15
Why are the WIPER selectors set to OFF during preflight?
5 / 15
Which windows are provided with backup anti-fog heat?
6 / 15
What do the EAI symbols on EICAS indicate?
7 / 15
When can engine anti-ice be operated manually?
Engine anti-ice can be operated manually both on the ground and in flight. This means that the system can be activated to prevent ice from forming on the engine during both stationary and moving conditions. The option "On the ground or in flight" indicates that the anti-ice system can be used in either situation, providing flexibility and ensuring the safety and efficiency of the engine operation. The condition of the TAT (Total Air Temperature) being above 10 degrees is not relevant to the operation of the engine anti-ice system.
8 / 15
Only the forward windows have exterior surface anti-icing. The forward windows have exterior and interior surface anti-fogging protection. The side windows have interior surface anti-fogging protection only.
9 / 15
The automatic ice detection system consists of:
The detector probes normally vibrate when the detection system is operating. If ice accumulates on a probe, the probe will vibrate at a lower frequency. The probe heater will turn on to melt the ice until the vibration frequency returns to normal. Once a detector probe has ice build-up, it is automatically de-iced.
10 / 15
The WINDOW HEAT switches control heating for all flight deck windows. With the switches ON, window heat operates as soon as:
11 / 15
A backup anti-fogging system for the flight deck windows operates automatically if there is a primary window heat system failure.
A backup anti-fogging system is available for the forward windows only: it operates automatically if there is a primary window heat system failure.
12 / 15
The Wing Anti-ice system operates through the delivery of hot air to the three midwing slats.
The hot air for wing anti-ice is provided by the pneumatic system.
13 / 15
With the WING ANTI-ICE selectors set to AUTO in flight, the wing anti-icing valves open when icing conditions exist and bleed air pressure is available.
14 / 15
Each engine has a dual loop anti-ice system duct leak detection system. If an anti-ice duct leak is detected:
15 / 15
What is the position of an engine anti-ice valve when the ENGINE ANTI-ICE selector is in AUTO and EAI is displayed?
When the ENGINE ANTI-ICE selector is in AUTO and EAI is displayed, it indicates that the engine anti-ice valve is open. This means that the valve is allowing hot air from the engine to flow into the engine intake, preventing ice from forming.
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