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Flashcards in Ice And Rain Deck (11)
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1

Which part of the airframe is anti-iced?

Hot air:
- 3 outboard leading edge slats of each wing.
- Engine air intakes

Electrical heating:
- flight compartment windows.
- pitot heads, static ports, AOA and TAT probes
- Water-waste drain mast.

2

Can APU be used for airframe anti-icing?

No

3

Where is the hot air taken from for:

a) engine anti-icing

b) wing anti-icing

a) An independent air bleed from the high-pressure compressor protects each engine nacelle from ice.

b) Hot air from the pneumatic system.

4

What happens if there is NO electrical control to the:

a) wing anti-ice valve

b) engine anti-ice valve

a) Wings: If the electrical power supply fails, the valves close.
b) Engine: If the electrical power fails, the valves open.

5

How long does the WAI ground test last?
What happens after that time?
What happens at lift-off if still on?

- 30 seconds, then the valves close.
- Valves close. Light still illuminates
- Valves re-open once lift-off.

6

What happens to the EPR/N1 and EPR/N1 limit, when EAI is selected ON?

N1 increases.

N1 limit reduces.

7

Which probes are NOT heated on the ground?

- The TAT probe will never be heated on the ground, regardless of probe heat pb position.

- Pitot heating operates at a low level - the changeover to normal power in flight is automatic)

8

In the AUTO position, when are PROBES and WINDOWS heated automatically?

- In flight
- On the ground (except TAT probes) provided one engine is running.

9

What is the maximum speed for the use of windscreen wipers?

230kts

10

Below what temperature can de-icing be switch off?

-40 degrees SAT during climb or cruise.
(Note: In the descent, anti-ice goes on regardless of temperature when in visible moisture.)

11

What defines icing conditions?

Less or equal to +10 degrees OAT or TAT, visible moisture.

Note: This includes clouds, fog, low visibility less or equal to 1NM, rain, snow, sleet, ice crystals or standing water, slush, ice or snow is present on the taxiways or runways.