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RJET E170 Study Guide 12B > Ice Protection/Detection > Flashcards

Ice Protection/Detection Flashcards

1
Q

What sources are used for aircraft anti-icing and de-icing?

A

Bleed air heat and electric heat

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2
Q

What uses bleed air for ice protection?

A

Engine lips, 3 outboard slats

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3
Q

What uses electric heat for ice protection?

A
  • Pitot Static system (smart and TAT probes)
  • Windshields
  • Water lines (drain masts)
  • Pressurization static port
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4
Q

When are the Air Data Smart Probes and TAT probes heated?

A

Whenever the engines are running

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5
Q

Where can you find both bleed air pressure and temperature?

A

Anti-ice synoptic page

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6
Q

What happens when the ICE PROTECTION MODE selector knob is in AUTO

A

Allows automatic operation of the engine anti-ice system

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7
Q

When will the engine and wing anti-ice systems operate automatically in the event of an ice encounter

A

When the ICE PROTECTION MODE selector is in AUTO

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8
Q

With the wing ice protection button pushed in it allows what?

A

Operates automatically or ON based on the ice protection mode selector robot and the ice setting in the MCDU

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9
Q

If an engine fails does the opposite wing and engine receive ice protection?

A
  • Yes, the crossbleed valve opens for the wings

- The failed engine doesn’t receive lip heat

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10
Q

How long will the de-ice system remain on after icing is no longer detected?

A

5 mins

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11
Q

At what temp are we considered in icing conditions?

A

SAT (ground) or TAT (flight) is 10C or below with any form of visible moisture and/or visibility of 1SM or less

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12
Q

When do you select “ALL” in the MCDU?

A

During taxi out and takeoff when SAT is 10 below and icing conditions exist

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13
Q

If ICING on the MCDU is set to OFF and on takeoff roll icing conditions are encountered, will the de-icing system turn on?

A

Not until 1700’ or 2 mins after takeoff, whichever occurs first

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14
Q

Can the APU be used to provide bleed air for de-icing?

A

No

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15
Q

What is protected from ice and rain?

A

Engine inlets, wing leading edge, smart probes, windshields, water drains

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16
Q

May a republic aircraft be flown into a known area of severe icing?

A

No

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17
Q

Is the icing system automatic?

A

Yes, under normal conditions

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18
Q

How can you override the system logic and turn the anti-ice system on?

A

Select ICE PROTECTION selector knob to ON

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19
Q

How many ice detection systems are installed?

A
  1. They are completely redundant. One will provide complete detection capability.
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20
Q

How is ice detected in flight?

A
  • Two ice detectors, vibrating sensor elements that change frequency when ice builds up around it
  • Once ice is detected, the sensor element heats, the ice melts, normal vibrating characteristics are restored and the heating stops. The cycle repeats as ice rebuilds on the probes
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21
Q

What would happen with the failure of one ice detector?

A

If the remaining detector senses an icing condition, the system automatically activates the ENGINE and WING anti-ice system

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22
Q

How is bleed air directed for pneumatic anti-ice

A

Engines - independent

Wings - onside bleed

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23
Q

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

A

10th high stage valve (HSV)

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24
Q

What part of the engine is heated?

A

Engine Lip

25
Q

What happens if there is a single bleed source failure?

A

The crossbleed automatically opens supplying airflow from one engine bleed to the opposite wing anti-ice

26
Q

What happens to the engine bleed valve with the loss of electrical power?

A

The engine bleed valve is fail safe open

27
Q

Do you have anti-ice protection during single engine?

A
  • Only the running engine will have lip protection

- The wings will be heated

28
Q

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

A

ALL

29
Q

What does selecting ALL on the MCDU provide and how long does the protection last if no ice detected with the ice mode selector knob in AUTO?

A

Engine: ON when engines running; OFF at 1700’ or 5 min after liftoff whichever happens first
Wing: ON at 40 kts wheel speed; OFF at 1700 AGL or 5 mins after takeoff whichever happens first

30
Q

When does the AUTO mode allow anti-ice to the engines and slats?

A
  • Whenever icing is detected in flight

- Based on system logic according to A-I selecting on the MCDU T/O DATASET MENU page

31
Q

What will happen on takeoff if the TO DATASET is set to ENG and the MODE selector is in AUTO and ice is detected?

A

The engine A/I will be on as long as the engines are running the wing A/I will be on up to 1,700’ or 2 mins after T/O

32
Q

What will happen on takeoff if the TO DATASET is set to ENG and the MODE selector is in AUTO and ice is not detected?

A

The engine A/I will be on but the wing A/I will not

33
Q

What does the pushed OUT position do on the selector knob for Engine 1 or 2 ice protection?

A

Closes the engine anti ice valve and prevents automation operation

34
Q

If the wing or engine ice protection buttons are pushed out the associated ate-ice system is?

A

Deactivated

35
Q

Turning the ICE PROTECTION MODE selector to ON does what?

A

Opens the engine and wing A/I valves

36
Q

How would you configure the ENGINE and WING A/I system for automatic operation?

A

The ENGINE 1 (2) ICE PROTECTION pushbuttons must be in. OFF, ENG, or ALL must be selected on the MCDU TO DATASET menu

37
Q

How do pilots know if icing conditions exist?

A

An ICE CONDITION advisory message on the EICAS

38
Q

When is the windshield heated when the WINDSHIELD HEATING 1 or 2 button is pushed IN?

A

Always on when there is AC power available, except in specific conditions

39
Q

What does the TIMER selection on the windshield wiper switch do?

A

Activates the associated wiper in 7 second intervals

40
Q

When there is only 1 AC source how does it affect the windshield heating system?

A

On ground: load shed

In flight: Left side is heated, right heats if left is failed

41
Q

What is the max airspeed for windshield wiper operations failed not in the park position?

A

320KIAS

42
Q

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

A
  • The wiper will stop

- To reset wiper move switch to OFF

43
Q

When does the smart probes and TAT probe heat turn on?

A

When an engine is running

44
Q

How many smart and TAT probes are there?

A

4 ADSP, 2 TAT

45
Q

When do we use the ice protection test selector knob?

A

TEST function is a maintenance procedure

46
Q

A failure of any of the water and waste heating systems is indicated?

A

On the flight attendant panel

47
Q

What would cause an ENG REF A-I DISAG EICAS message?

A

Anytime the MCDU TO DATASET is in a different configuration from the aircraft bleed and A/I configuration

48
Q

Name a few types of ice and which is most common?

A

Clear, mix, rime; Rime is most common

49
Q

How should the aircraft be configured for de-icing?

A

Bleeds - OFF
Stab trim - Full nose down
Flaps - UP
Engines and APU ON or OFF

50
Q

With the Ice Detection Mode Selector knob set to AUTO and the T/O DATASET “REF A/I” set to OFF, the wing and engine A/I is inhibited until when?

A

1700 AGL or 2 mins after liftoff, whichever occurs first

ASM 16-10

51
Q

What speed could you use windshield wipers?

A

250 KIAS max

52
Q

Are wings heated on the ground? At what speed do they heat?

A

Only if A/I is set to ALL - activates wheel speed >40 kts

ASM 16-10

53
Q

How much of the wing is heated?

A

3 outboard leading edge slats

54
Q

When are engines heated on the ground?

A

If the MCDU is set to ALL and the respective engine is running

55
Q

With the ice detection mode selector set to ON, when will the engine A/I system operate?

A

When the engines are running

56
Q

How do you recognize tailplane icing? What is the recommended recovery procedure when tailplane icing is felt?

A
  • Lightness of yoke and usually occurs after changing configurations (flaps)
  • Undo what you just did, use power judiciously, pull back on yoke
57
Q

When must engine A/I be on?

A

All flight and ground ops when icing conditions exist or when ICE is annunciated, except in climb and cruise

58
Q

When the ice detectors automatically activate the engine and wing A/I how long will the ice detectors remain activated?

A

For 5 mins after the detector is no longer sensing an icing condition

RJET E170 Study Guide 12B (16 decks)

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