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175 E > ICE DETECTION > Flashcards

ICE DETECTION Flashcards

1
Q

What sources are used for anti icing and deicing?

A

What sources are used for anti icing and deicing?

  1. Bleed Air heat (Engine Lips, Wings Slats 2,3,4)
  2. Electrical heat (Windshields,ADSP4,TAT2,Waterlines)
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2
Q

What uses bleed air for ice protection?

A

What uses bleed air for ice protection?

  1. Engines lips (HP #10 bleed)
  2. Outboard Slats (2,3,4 on each wing)
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3
Q

What compressor stage is bleed air tapped for anti-icing operations?

A

What compressor stage is bleed air tapped for anti-icing operations?
10th High stage valve (HSV

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4
Q

What uses electrical heat for protection?

A

What uses electrical heat for protection?

  1. Smart probes
  2. TAT probes
  3. Windshields
  4. Water lines
  5. Pressurization static port
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5
Q

If an engine fails, does the opposite wing and engine receive
bleed air?

A

If an engine fails, does the opposite wing and engine receive
bleed air?
Yes
X-bleed opens automatically when bleed source is lost and
opposite wing receives bleed air, failed engine lip does not
receive heat to the engine lip.-

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6
Q

How many ice detectors must be working to have ice

detection?

A

How many ice detectors must be working to have ice
detection?
One, 2 for redundancy

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7
Q

How long will the deicing system remain on after icing is no

longer detected?

A

How long will the deicing system remain on after icing is no
longer detected?
5 mins

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8
Q

IF ICING on MCDU is set to OFF and takeoff roll icing

conditions are encountered, will the deicing system turn on?

A

IF ICING on MCDU is set to OFF and takeoff roll icing
conditions are encountered, will the deicing system turn on?
Yes at 1700 ft AFE or 2 mins after takeoff whichever happens first

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9
Q

If “ALL” is selected on the ground at what point will the anti-ice system
become automatic?

A

If “ALL” is selected on the ground at what point will the anti-ice system
become automatic?
1700 ft. AGL or 2 minutes after takeoff (whichever happens first)

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10
Q

Can the APU be used to provide bleed for anti-ice?

A

Can the APU be used to provide bleed for anti-ice?

No

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11
Q

What is protected from ice & rain?

A

What is protected from ice & rain?

  1. Engine inlets (HP # 10 bleed)
  2. Wing leading edge
  3. Smart probes and TAT probes
  4. Windshields
  5. Water & waste drain systems
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12
Q

Is the ice protection system automatic?

A

Is the ice protection system automatic?

Yes under normal conditions

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13
Q

Can the pilot override the automatic system?

A

Can the pilot override the automatic system?

Yes, MODE AUTO-ON

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14
Q

How is ice detected?

A 
How is ice detected?
2 ice detectors
1. Smart probe vibrates,
2. ice accumulates and vibrating freq. changes,
3. sensor element heats
4. Wing and Eng A/I activates
5. Ice melts off probes
6. Probes return to normal conditions
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15
Q

How is bleed air directed for pneumatic anti-ice for engines

and wings?

A

How is bleed air directed for pneumatic anti-ice for engines
and wings?
Engines = Independent
Wings = onside bleed

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16
Q

What happens if there is a single bleed source failure?

A

What happens if there is a single bleed source failure?

Crossbleed valve automatically opens

17
Q

When will the crossbleed valve automatically open?

A

When will the crossbleed valve automatically open?
• Only one side bleed source is available
• Eng 2 start in the air
• Eng 1 start in the air (if APU is not avail)

18
Q

How should the MCDU be set if there are icing conditions

present on the ground?

A

How should the MCDU be set if there are icing conditions
present on the ground?
ALL

19
Q

If ‘ALL’ is selected on the ground, at what point will the anti-ice system become automatic?

If ‘OFF’ is selected on the ground, at what point will the anti-ice system become automatic?

A

If ‘ALL’ is selected on the ground, at what point will the anti-ice system become automatic?
1700’ AGL or 2 minutes after takeoff (whichever happens first)

If ‘OFF’ is selected on the ground, at what point will the anti-ice system become automatic?
1700’ AGL or 2 minutes after takeoff (whichever happens first)

20
Q

How does the failure of one of the two power sources affect the windshield heating system?

A

How does the failure of one of the two power sources affect the windshield heating system?
On ground Inhibited
In Flight Left side is heated (right heats if left has failed)

21
Q

What is set on the MCDU for TATs between 5o and 10o for ice
protection?

What is set on the MCDU for TATs below 5o?

A

What is set on the MCDU for TATs between 5o and 10o for ice
protection?
ENG

What is set on the MCDU for TATs below 5o?
ALL

22
Q

What does selecting “ALL” on the MCDU provide for ice protection?

A

What does selecting “ALL” on the MCDU provide for ice protection?
Engine anti ice = ON while engines are running
Wing anti ice = ON at 40 kt wheel speed

23
Q

How does the failure of one of the 2 power sources affect the
windshield heating system?

A

How does the failure of one of the 2 power sources affect the
windshield heating system?
1. On ground = inhibited
2. In flight = Left side is heated (right heats if left side fails)

24
Q

What does the “TIMER” selection on the windshield wiper switch do? 2 swipe

A

What does the “TIMER” selection on the windshield wiper switch do? 2 swipe
Activates the associated wiper in 8-second intervals (2 sweeps in 8 sec)

25
Q

What happens if the wiper is operated on a dry windshield?

A

What happens if the wiper is operated on a dry windshield?

  1. Wiper will stop
  2. To reset wiper move switch to OFF
26
Q

When do the smart probes begin heating?

A

When do the smart probes begin heating?

When engines are running

27
Q

Is there a test for the ant ice System?

A

Is there a test for the ant ice System?

Yes, but this is a maintenance task

28
Q

How should the aircraft be configured for deicing?

ANTI ICING FLUID is getting applied

A 
How should the aircraft be configured for deicing?
ANTI ICING FLUID is getting applied
1. Bleeds = OFF
2. Packs = OFF
3. Stab. Trim = FULL NOSE DOWN
4. Flaps = UP
5. Engines and APU = ON or OFF
29
Q

How many AC electrical sources are required for normal windshield heat operation?

A

How many AC electrical sources are required for normal windshield heat operation?
2 AC sources

30
Q

When the batteries are the only electrical source to the

aircraft, which ADSP is the heated?

A

When the batteries are the only electrical source to the
aircraft, which ADSP is the heated?
Only ADSP 3

31
Q

How does the engine anti-ice valve fail?

A

How does the engine anti-ice valve fail?
It fails to the OPEN position, not to be confused with IF ENG shuts
down the valve CLOSES to prevent unnecessary engine lip
heating to dead engine

175 E (21 decks)

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