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AT354 Hawker Ground > Ice/Rain Protection > Flashcards

Ice/Rain Protection Flashcards

1
Q

What are the protected areas on the Hawker for anti-ice?

A

Windscreens, air data probes, ice detector, main wing leading edges, horizontal stabilizer leading edges, and engine inlet cowling

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2
Q

Is the Hawker anti-ice or de-ice?

A

Anti-ice

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3
Q

What does the ice detection system include?

A

Rotary cutter ice detector and ice detection light

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4
Q

What does the AUTO and OVRD settings do on the ice rotary cutter?

A

AUTO: operates when weight off wheels (left main)

OVRD: operates continuously on ground and inflight

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5
Q

How is the rotary ice cutter powered?

A

AC power from XS2 bus

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6
Q

How does the rotary ice cutter work to detect ice?

A

When ice forms, rotary cutter shaves ice, which increases torque on the rotor - when the torque is increased, a white ICE DETECTED annunciator is illuminated in the cockpit

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7
Q

What are some examples of other ice detection systems on different aircraft?

A

Rosemount: vibration and heat of transformation

Sunstrand: Strontium 90 radiation

Vibro-Meter: vibrations

Simmonds Precision: pulse-amplitude

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8
Q

When does the white ICE DETECTED annunciator indicate? When does it extinguish?

A

Ice has formed on the rotary cutter - extinguishes when icing ceases plus 60 second delay

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9
Q

What are the ice lights used for?

A

Visual inspection of the leading edges of both wings for night conditions, controlled by the ICE/LOGO switch and powered by the PS1 bus

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10
Q

What is the main airframe anti-ice system?

A

TKS fluid for wing and horizontal stabilizer leading edges

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11
Q

At what temperatures should you not have the TKS system activated?

A

Below -28ºC

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12
Q

What is the capacity of the TKS tank? How much protection is given, in minutes?

A

10 gallon tank capacity, providing ~ 108 minutes of protection

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13
Q

At what capacity does the TKS fluid gauge indicate FULL? 1/4? EMPTY?

A

At FULL, there are (at least) 8.25 gallons of TKS fluid, at 1/4 there are 30 minutes left, at EMPTY there are around ~12 minutes of protection left

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14
Q

How is the TKS system controlled in the cockpit? What are some special considerations of the TKS fluid system?

A

Rotary timer on overhead panel, allowing 10 minute intervals - the first minute of activation provides a higher flow rate of fluid, must be primed for 2 minutes before flight

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15
Q

What does an ANTICE LO PRESS annunciator indicate?

A

Low system pressure with pump on

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16
Q

What does an ANTICE LO QTY annunciator indicate?

A

30 minutes of TKS fluid left

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17
Q

What drives the windscreen and sidescreen heat?

A

Engine alternators

18
Q

What alternator powers each windscreen, sidescreen, and stall vane heat?

A

No.1 Engine Alternator:
- Left windscreen heat
- Right sidescreen heat
- Left stall vane heat

No.2 Engine Alternator
- Right windscreen heat
- Left sidescreen heat
- Right stall vane heat

19
Q

What happens to the windscreen/sidescreen heat if one engine alternator fails?

A

Remaining alternator powers both windscreens but sidescreens are shed

20
Q

How is windscreen heat controlled?

A

L/R SCREEN HEAT switch on overhead panel: Normal heat provided with switch on, higher level with switch on and engine anti-ice switch selected on

21
Q

What does a L/R SCREEN OVHT and SIDE SCRN OVHT annunciator indicate?

A

Indicates overheat condition on the windscreen or sidescreen; controlled at higher temperatures by removing power

22
Q

How does the engine anti-ice protection function?

A

Bleed air from each engine used for anti-ice of respective engine - controlled by ENG 1/2 ANTICE switches on overhead panel which operates electrically controlled, pneumatically operated valves

23
Q

How do the valves for the engine bleed air anti-ice work?

A

Valves are de-energized open (when power is lost, valves default to an open state - must be powered to close valves)

24
Q

In the ON position for the ENG 1/2 ANTICE switch, what happens?

A

P2T2 probe in engine inlet is heated, and associated windscreen heat temperature is increased

25
Q

What does an ENG 1/2 A/ICE annunciator indicate?

A

Low pressure condition in engine anti-ice system

26
Q

What are some speed limitations on the Hawker involving heating?

A

Bird Strike (Cold ground soak, heat is on for required time limit): 280 KIAS to 8,000 feet

Bird Strike (Heat is off < -10ºC): 257 KIAS to 8,000 feet

27
Q

What is the maximum continuous generator load on the Hawker?

A

300 amps

28
Q

What are the limitations for the APU in known icing conditions? Ground de-icing procedures?

A

Operation in known icing condition: APU operation is not approved

Ground De-Icing Procedure: APU must be shut down during ground de-icing of the airplane

29
Q

The following component(s) is/are anti-iced by the use of hot bleed air:

A

Engine inlet cowlings

30
Q

For takeoff or landing approach in icing conditions, the following switches must be turned on:

A

ENG INGNITION, ENG ANTICE, WING/TAIL ANTICE

31
Q

The following switches provide DC power to the rudder bias heater muffs:

A

PITOT/VANE HEAT

32
Q

The following statement(s) is/are true:

A. The engine inlet cowling is heated by hot bleed air
B. With the ENG ANTICE switch energized and the computer switch in AUTO, electrical power is supplied to heating elements on the P2T2 sensor
C. When not in icing conditions, engine anti-icing must not be used for more than 10 seconds in ambient air temperatures above 10°C
D. All of the above

A

D. All of the above

33
Q

The ICE PROT ^ annunciator on the MWS panel does not illuminate when:

A

PITOT/VANE HEAT is on and operating normally

34
Q

The following component may fail to operate satisfactorily when the left pitot heat is inoperative:

A

ADC No. 1

35
Q

The ENG 1 (or 2) A/ICE annunciator (when illuminated) indicates:

A

That anti-icing pressure is not available at sufficient pressure

36
Q

The PITOT AMPS ammeter checks amperage of:

A

The left or right pitot heating elements (as selected)

37
Q

The forward static plates are heated:

A

Only when airborne

38
Q

When engine anti-icing is required, the ENG ANTICE switches should be turned on:

A

Before takeoff power is set

39
Q

The TKS fluid supply lasts for approximately:

A

108 minutes

40
Q

The airframe anti-icing system:

A

Should be primed before flight

41
Q

The following ICE PROTECTION switches shall always be switched on before takeoff and remain on throughout the flight:

A

PITOT/VANE HEAT and SCREEN HEAT

AT354 Hawker Ground (10 decks)

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