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Dash 8 Q300/200 > Ice- Rain Protection > Flashcards

Ice- Rain Protection Flashcards

1
Q

When the Airframe manual switch is selected to a boot set what occurs?

A

The boot set remains inflated while the switch is selected to that boot set

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2
Q

Pitot/static heating is powered by What?

A

28 V DC

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3
Q

Temperature sensors prevent the elevator horn heating from operating above what?

A

15°C

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4
Q

With the prop timer switch selected to below -10°C each propeller blade pair heats for how long?

A

20 Seconds with a 60 Second dwell.

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5
Q

If the Airframe auto switch is selected off mid cycle what occurs?

A

The entire boot set inflation cycle finishes before deactivation

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6
Q

A successful test of the elevator horn heating on the ground is indicated by what?

A

Illumination of both elevator horn heat caution lights, with both lights extinguishing shortly after

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7
Q

Illumination of the DE ICE PRESS caution light indicates what?

A

The pressure in the D icing system is below 5.5 PSI

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8
Q

Where are the ice protection panels installed?

A

On the fuselage adjacent the propellers

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9
Q

The valve heat switch on the ice protection panel controls heating to what?

A

Distributor valve assemblies

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10
Q

Angle of attack (AOA) Vane heating is available when ?

A

Whenever 115 V variable frequency a.c. is applied

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11
Q

When the Airframe auto switch is selected to slow each full cycle including Dwell period takes how long?

A

Four minutes

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12
Q

The automatic ignition system operates the igniters when ?

A

NH speed falls below 60%

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13
Q

In addition to De-icing Boot inflation, De-ice air is also provided to what?

A

The rear outflow valves, inflatable door seals and the rudder shut off valve

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14
Q

When the aircraft De-icing boots are operating in fast each boot set remains inflated for how long?

A

Six seconds

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15
Q

De-icing system air is regulated at approximately what psi?

A

18 psi

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16
Q

Protection against Air frame icing is provided by what?

A

Pneumatic airframe De-icing system utilising engine Bleed air.

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17
Q

What kind of inflatable boots sections are located on the aircraft?

A

Conventional inflatable boot sections are located on the leading edges of the wings, horizontal and vertical stabilises and the engine nacelle inlet lips

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18
Q

How are the propellers protected from ice accumulation?

A

By De-icing electric heater elements bonded to each of the blades

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19
Q

De- icing is supplemented by thermal anti-icing heater systems for which components of aircraft?

A

Pitot tubes, static ports, alpha vane sensors, engine intakes, front windshield, pilot side window and elevator horns.

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20
Q

Icing conditions on the ground?

A

Visible moisture with SAT; +10°C or below on ground and for takeoff, +5°C or below in flight.

Taxiway/runway contaminated with standing water, snow, ice at +10°C or below

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21
Q

When is the aircraft considered to be aerodynamically clean?

A

When all ice is removed from the visible leading edges and wingtips

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22
Q

What are the propeller heater elements powered by?

A

115 V variable frequency a.c.

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23
Q

When do the propeller de ice lights on the ice protection panel illuminate?

A

Each illuminates when the timer powers the associated blade pair

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24
Q

How can we determine that the elements are operating normally?

A

The a.c. variable frequency load meter on the a.c. monitor panel can be monitored

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25
Q

What protects the propeller heaters from possible overheat?

A

The proximity switch electronic unit Deactivates the heaters when the aeroplane is on the ground through the weight on wheels switch

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26
Q

How to test the propeller heat on the ground?

A

Prop test switch on the ice protection panel activates the heater sequence

27
Q

Prop advisory lights sequence for testing on ground?

A

1324

28
Q

Which propeller heating timer is usually selected?

A

The pilot flying side is selected

29
Q

How many boots for the wing leading edges and the horizontal and vertical stabilises?

A

Five boots outboard of the engine nacelles and one boot inboard of the engine nacelles two on the vertical stabiliser And two boots on each side of the horizontal stabiliser

30
Q

What two valves in the rear of the aircraft does De-ice pressure get delivered to?

A

Rudder shut off valve and the pressurisation outflow valve

31
Q

Engine bleed air supplied by what?

A

By either or both of the dual pressure regulator assemblies which are located in their respective nacelles

32
Q

The regulators admit air to the De- icing system pneumatic lines continuously at what psi?

A

18 psi

33
Q

The pressure relief valve opens to vent excessive pressure overboard at approximately what psi?

A

21PSI

34
Q

Where are the six distributor valve assemblies located?

A

Two in each wing leading edge and two in the dorsal fin

35
Q

The De-ice system is interconnected by what valve?

A

Isolation valve

36
Q

What controls the isolation valve?

A

A lever locked Boot air iso valve switch on the ice protection panel

37
Q

The boot air iso-valve switch may be selected momentarily to iso-to check what?

A

Regulated pressure in each individual system

38
Q

Can you tail section be isolated?

A

No but has a restrictor valve to reduce pressure loss should a leak develop in the empennage

39
Q

The electronic timer when activated opens ?

A

The distributor solenoid valves in a preprogrammed sequence

40
Q

Set one of the boots is dedicated to which section?

A

The two boots on each outer wing section

41
Q

What Is set. two of the boots dedicated to?

A

Single outer midsection inflation boots

42
Q

How long does each inflation set take?

A

Six seconds and there’s six sets so therefore 36 seconds to complete

43
Q

How long is the Dwell period for fast and slow for the boots?

A

24 seconds for the fast cycle mode or three minutes and 24 seconds in the slow mode

44
Q

The boot inflation advisory lights will eliminate when ?

A

Illuminates when the boot inflates and the pressure downstream of the distributor valve is greater than 15 PSI

45
Q

What do the De-ice ejectors do?

A

Apply suction to the boots speeding up deflation and holding the boots firmly to the leading edge.

46
Q

With no de-ice pressure to one wing the air frame Boots should be operated on which mode?

A

Airframe manual mode

47
Q

Integral heaters are built into the distributor assemblies all of which are activated by what?

A

By a single distributor valve heat switch on the ice protection panel

48
Q

Elevator horn elements are heated by what ?

A

115 V single phase variable frequency a.c. power

49
Q

How does the elevator horn heat not make the elevator horns over temperature?

A

Relies on slipstream air cooling to limit temperature

50
Q

Elevator horn heater circuit is Denergised above What temperature?

A

15°C

51
Q

Why would you see the elevator horn caution lights?

A

They are not receiving the 115 V a.c. power or the heater element is damaged

52
Q

How to confirm horn heaters are operative?

A

By selecting the elevator horn test switch to test the left and right elevator horn heat caution lights will illiminate and after a delay of between 2 and 20 seconds they will extinguish

53
Q

When are the engine intake heaters activated?

A

When the engine intake bypass door switch lights are pressed,Oil pressure switch sensors that the engine is an operation and outside air temperature is less than 15°C

54
Q

Windshield heat controls are located where?

A

Overhead console

55
Q

What are the windscreen heaters powered by?

A

115 V a.c.

56
Q

When selected to warmup the front windscreen heaters are powered by what?

A

The left 115 V a.c. bus

57
Q

How do we do a windscreen heat reset?

A

To reactivate window heating the heat switch must be selected to warm up followed by norm after an appropriate cooling period.

58
Q

Windscreen wiper motors are powered by what?

A

28 V DC right secondary bus

59
Q

If the heating elements in the AOA vanes are in NOT powered what will you see in the caution lights?

A

Pusher system fail number one stall system fail and number two stall system fail

60
Q

Pilots pitot probe is powered by what?

A

28 V DC L essential bus

61
Q

The copilots pitot probe is powered by what?

A

28 V DC right main bus

62
Q

Where is the representative surface on the 300?

A

Outboard roll spoiler

63
Q

What are the stall warning lift transducers heated by?

A

28 V DC on the ground and 115 V a.c. in the air

Dash 8 Q300/200 (74 decks)

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