ICE & RAIN

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Questions and Answers

What happens when the wing anti-ice P/B is set to ON on the ground?

The wing anti-ice control valves do not open

The wing anti-ice control valves open for 30 seconds as a test sequence (correct)

Wing anti-ice control valves open if a pneumatic supply is available, and remain open

Wing anti-ice control valves open provided OAT <10 ̊C

The ON light illuminates on the wing anti-ice P/B:

When the anti-ice valves open

When the P/B is set to ON (correct)

When the FAULT light goes out

When the anti-ice valves open and the fault light goes out

In the event of loss of electrical supply, the engine anti-ice valve:

Opens when the engine is shut down

Opens when the engine is running (correct)

Closes when the engine is running

Opens when the engine is running if OAT < 10 ̊C

When the probe heat switch is in the AUTO position probe heat starts automatically:

When at least one engine is running (heat operates at low level) Signup and view all the answers

How is window heating regulated?

By two independent Window Heat Computers (WHC) one for each side Signup and view all the answers

Window heat:

Comes on automatically when at least one engine is started, or the aircraft is in flight Signup and view all the answers

The window heat computer provides two power levels for the windshield:

High power in flight, low power on the ground Signup and view all the answers

Pitot heating operates:

At a low level on the ground and at normal power in flight Signup and view all the answers

Window heat can be:

Operated automatically after engine start or can be selected on manually before start with the PROBE/WINDOW HEAT PB Signup and view all the answers

Electrical heating is provided for the protection of:

Pitot heads, static ports, AOA probes and TAT probes Signup and view all the answers

The engine nacelle is anti-iced by:

Air bleed for the high-pressure compressor Signup and view all the answers

When engine anti-ice is selected on:

Continuous ignition is selected on automatically when the anti-ice valve is open Signup and view all the answers

When an engine anti-ice valve is open:

N1 limit is automatically reduced and the idle N1 is automatically increased Signup and view all the answers

In the event of low air pressure:

The engine anti-ice valve closes automatically Signup and view all the answers

How can you check that engine anti-ice has been selected on:

The blue ON light on the associated engine anti-ice P/B and the ENGINE ANTI-ICE memo on the E/WD Signup and view all the answers

The speed limitation for use of windshield wipers is:

230 kts Signup and view all the answers

The rain repellent system is inhibited:

When both engines are shut down and the aircraft is on the ground Signup and view all the answers

The rain repellent bottle should be replaced:

When the pressure indicator needle is in the yellow sector or when the refill float is in view Signup and view all the answers

The electric wipers are controlled:

By 2 individual rotary selectors Signup and view all the answers

The wipers can operate at different speeds:

Low speed and high speed Signup and view all the answers

The rain repellent bottle and pressure indicator is located:

In the rear cockpit on the left-hand side Signup and view all the answers

When the rain repellent P/B is pressed:

The timer applies a measured quantity of rain repellent to the selected windshield Signup and view all the answers

When the wiper is turned off:

The wiper stops out of view Signup and view all the answers

The wing anti-ice shut-off valves close automatically in case of:

Leak detection or loss of electrical power supply Signup and view all the answers

Slats protected by hot air supplied from the pneumatic system are:

The three outboard leading edge slats 3, 4, 5 Signup and view all the answers

The wing anti-ice shutoff valves are controlled by:

1 wing anti-ice PB Signup and view all the answers

Where do the wing anti-ice indications appear on ECAM

‘ANTI-ICE’ appears in white on the ECAM bleed page and ‘WING A.ICE’ appears in green on the ECAM memo when the wing P/B is pressed Signup and view all the answers

Study Notes

Wing Anti-Ice System

When the wing anti-ice P/B is set to ON on the ground, the ON light illuminates, indicating activation.
In case of electrical supply loss, the engine anti-ice valve closes to prevent ice formation.
The wing anti-ice system utilizes pneumatic heating from the engine to maintain wing functionality.

Probe Heating

Probe heat activates automatically when the probe heat switch is in the AUTO position, ensuring reliable aircraft performance.

Window Heating Management

Window heating is regulated by a computer that adjusts the power levels based on ambient conditions.
The window heat computer provides two power levels specifically for the windshield to maintain visibility.

Pitot and Window Heat

Pitot tube heating operates independently to prevent ice blockage.
Window heat can be adjusted as needed, providing flexible heating depending on conditions.

Electrical Heating

Electrical heating systems protect critical components like probes and windows from icing.

Engine Anti-Icing Procedures

The engine nacelle is anti-iced via hot air supplied from the engine, preventing ice accumulation during flight.
When engine anti-ice is selected ON, the respective systems engage to protect the engine's performance.
When the engine anti-ice valve is open, it allows hot air to circulate, maintaining proper operation under icy conditions.

Air Pressure Considerations

Low air pressure may affect engine performance and can trigger automatic safety measures in the anti-ice systems.

Engine Anti-Ice Selection Check

Engine anti-ice selection can be verified through indicator lights or system status displays in the cockpit.

Windshield Wiper Operations

The windshield wipers have a speed limitation; operations should not exceed safe speeds to avoid damage.
The rain repellent system is inhibited in certain conditions to prevent malfunction.
The rain repellent bottle requires replacement when empty for continued effectiveness.
Electric wipers are controlled through a cockpit interface, allowing for variable speed settings to accommodate conditions.

Rain Repellent and Indicator

The rain repellent bottle and its pressure indicator are situated in a designated area for easy access and monitoring.
Pressing the rain repellent P/B activates the system, applying the repellent for enhanced visibility.
When the wiper is turned off, the system resets and prepares for the next use.

Wing Anti-Ice System Shutdown

The wing anti-ice shut-off valves automatically close in specific scenarios to safeguard the system.
Slats are protected by hot air supplied from the pneumatic system, preventing ice formation during flight.
The wing anti-ice shutoff valves are managed via electronic controls for efficient operation.

ECAM Indications

Wing anti-ice system indications are displayed prominently on the ECAM for crew awareness and operational monitoring.

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