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M11 New > 11.12 > Flashcards

11.12 Flashcards

1
Q

What is clear ice and how is it formed

A

Aka glaze ice

Formed when only some of the droplet freezes

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2
Q

What is rime ice

A

Small droplets are supercooled

Lighter then clear

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3
Q

What effects does ice have on aircraft

A

Increase drag and reduce thrust

Increase weight and decrease lift

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4
Q

Where are wing inspection lights

A

Each side of fuselage foward section

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5
Q

What are visual ice indicators

A

Posts on the windshield , if ice forms tells the pilot the aircraft is icing over

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6
Q

What angle is a hot rod detector

A

30 degrees

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7
Q

How can we deice the hot rod detector

A

It has a heated element within it which is operated by press button in cockpit

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8
Q

What are the number of holes in a pressure operated ice detector

A

4 holes in leading edge
2 holes in trailing edge

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9
Q

Where is a rotory detector placed and what motor is it

A

Forward fuselage and has a single phase ac motor

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10
Q

What frequency does a vibrating probe operate

A

40Khz

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11
Q

How does the sangamo western ice detector work

A

Icy conditions are detected rather then ice formation

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12
Q

What are the 3 parts of the element ice sensing unit

A

Moisture detector controller

Moisture sensing head

Thermal switch

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13
Q

What is the sunstrand system

A

Uses beta particles that release from a strong 90 radiation source

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14
Q

How does primary manual work

A

Ice detection alters crew and they activate ice protection manually

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15
Q

What are ice detection alerts

A

Visual and/or audio alerts to draw flight crews attention

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16
Q

How do we thermal pneumatic anti ice

A

Warm air into piccolo tubes then gets spread over inner surface of aerofoil

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17
Q

What air is used for wing anti ice system

A

Air bled off from engines

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18
Q

Why are joining sections of ducting hermetically sealed

A

To prevent the loss of air

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19
Q

When can we use the wai system

A

In the air and ground tests

20
Q

What is the wai valve and what does it control

A

Electrically controlled and Pneumatically actuated

Controls the flow of bleed air from the pneumatic system

21
Q

What air is used in engine anti ice and how is it controlled

A

Bleed air is used and is Pneumatically actuated to control flow of air

22
Q

What force do windshields need to withstand

A

4lbs

23
Q

Where are hearing elements in a windshield

A

Inside of outer glass ply

24
Q

What is a high heat level

A

Higher intensity of heat to smaller precise area

25
Q

What is normal heating level

A

Heat to the broadest area of windshield

26
Q

Disadvantage of tkstm

A

Only carry a certain amount that can run out

27
Q

What are pneumatic de ice boots

A

They expand with pneumatic air and break away ice when it forms

28
Q

How quick are boots inflated

A

6 to 8 seconds and deflated by vaccine section

29
Q

In small aircraft how is the de-ice system used

A

Pilot has to manually start the inflation/deflation cycle

30
Q

How do you trouble shoot de icer boot

A

ATA chapter 30

31
Q

What anti ice fluid is used

A

Isopropyl alcohol

32
Q

What anti ice fluid is used

A

Isopropyl alcohol

33
Q

Where are the heating elements on a propeller to de ice

A

Internally and externally on the propeller spinner and blades

34
Q

How long are propeller electrical de icing periods

A

15-30 seconds

35
Q

How long is a propeller electrical de icing cycle

A

2 minutes

36
Q

When should chemical rain repellent be used

A

Very wet conditions as dry windows undiluted repellent restricts visibility

37
Q

What windshield coating is used

A

Hydrophobic coating

(never polish or wax windows with this coating)

38
Q

How do you clean hydrophobic windshields

A

50/50 isopropyl and deionised/distilled water

Soft cloth or nonabrasive paper towel

39
Q

What is pneumatic rain removal

A

Hot air that beaks up raindrops and heats windshield to stop moisture from freeezing

Air supplied by electric blower and bleed air

40
Q

When is caution necessary with probes

A

They can become very hot

41
Q

What’s used to heat water and drain lines

A

Heater blankets

In-line heaters

Heater boots

42
Q

How are flight crew windshields operated

A

Separate systems to maintain clear vision if one window system fails

43
Q

What are the 3 parts of a wiper

A

Wiper

Wiper arm

Wiper motor/converter

44
Q

How many cycles in a low wiper mode

A

160 cycles per minute

45
Q

How many cycles in a low wiper mode

A

160 cycles

46
Q

How many cycles in a high wiper configuration

A

250 per minute

47
Q

What caution should you take with the wiper system before carrying out any maintenance

A

Window heat circuit breakers on to prevent electrical shock

M11 New (17 decks)

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