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Sierra West Airlines > PTM Ch. 10 Ice and Rain Protection > Flashcards

PTM Ch. 10 Ice and Rain Protection Flashcards

1
Q

The Metro is certified into what icing conditions?

A

Light and moderate icing

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2
Q

What components have ice and rain protection?

A
  1. Wings and horizontal stabilizer
  2. Engine and nacelle inlets
  3. Propellers
  4. Oil cooler ducts
  5. Windshields
  6. Pitot tubes and SAS vanes
  7. Fuel system
  8. Window defog
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3
Q

What protects the leading edges of the wings and horizontal stab?

A

Deice boots

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4
Q

What bleed air is used for deice boots?

A

18 psi regulated bleed air

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5
Q

The boots are deflated and held down how?

A

Suction

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6
Q

How does the auto cycle work for the deice boots?

A

3 minute cycle

6 sec wings
4 sec horizontal stabilizer
170 sec rest

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7
Q

What does the manual setting for deice boots do?

A

All boots (wings and stab) are inflated

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8
Q

When should AUTO be selected?

A

When ice accumulation is 1/2 to 1 inch every 3 minutes.

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9
Q

Should you turn on deice before you get 1/2 to 1 inch build up of ice?

A

No

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10
Q

Why will the pressure on the DEICE PRESS indicator?

A

The pressure drops first for the wings and then again for the stab

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11
Q

How are the deice boots controlled?

A

Electrically

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12
Q

How are the boots switch electrically powered?

A

Powered by left essential bus transferable to the right essential bus.

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13
Q

How are the engine and nacelle inlets heated?

A

Unregulated bleed air

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14
Q

What does the ENGINE & PROP switch do?

A

Routes hot bleed air to engine inlet cowling, engine inlet ice shield, P2T2 probe. The electric prop boots and electric oil cooling ducts are also activated.

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15
Q

When the ENGINE & PROP is selected on what annunciator will illuminate?

A

L & R INTAKE HEAT annunciators

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16
Q

The PROP & DUCT switch activates what?

A

Only the electric prop boots and electric oil cooling ducts

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17
Q

Use of engine inlet heat on the ground MUST be restricted to a maximum of

A

10 sec and 71% RPM when OAT is above +5 dC

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18
Q

When should ENGINE & PROP HEAT be used?

A

Prior to entering icing conditions and should be continuously during icing conditions

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19
Q

What are icing conditions?

A

OAT <5 dC and visible moisture

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20
Q

What will happen to EGT and torque when you turn on ENGINE & PROP HEAT?

A

EGT will increase slightly and torque will decrease slightly.

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21
Q

When turning on the ENGINE & PROP HEAT, what should be turned on first?

A

Continuous ignition

22
Q

Should you turn on both ENGINE & PROP HEAT at the same time?

A

No. One at a time allowing the engine to stabilize before turning on the other.

23
Q

Intake heats are powered by what bus?

A

Left essential bus transferable to the right

24
Q

The INTAKE HT annunciator are what kind of lights?

A

Agreement lights

25
Q

When the engine intake valves are off, how do you check the valve position?

A

Press the ENGINE INTAKE HEAT TEST buttons. If the valve is closed the INTAKE HT annunciator a will illuminate.

26
Q

The electrical heat is applied to oil cooling ducts when a thermostat calls for heat. What is the thermostat set to?

A

90-120 dF

27
Q

When will the green DUCT HEAT CYCLE illuminate?

A

When heat is applied to the duct.

28
Q

How do the prop deice work?

A

A timer cycles power between symmetrical blades

29
Q

How often do the prop deice boots cycle between symmetrical blades?

A

Every 34 seconds

30
Q

How long should you check the PROP DEICE AMPS?

A

1 min

31
Q

What if the trimeter for the Prop deice is below the green arc?

A

One blade may not be receiving heat and icing should be avoided

32
Q

Should the propeller deice boots and oil cooler ducts be operated when the props are static?

A

No

33
Q

How is propeller ice powered?

A

By respective essential bus and is NOT transferable

34
Q

Fuel is anti-iced how?

A

Automatically by hot scavenge oil through oil-fuel heat exchanger

35
Q

What is the anti-ice lockout valve for?

A

It closes during engine start and opens at 60% RPM, this prevents diversion of fuel for engine start.

36
Q

Windshield heat is kept between what temperatures?

A

90-100 dF

37
Q

When using LOW for windshield heat will windshield heat work if only one side is requesting heat?

A

No. Both need to be requesting LOW for LOW to work.

38
Q

Can you operate windshield heat on HIGH independently?

A

Yes

39
Q

Who’s windshield heat is transferable to the R essential bus?

A

Pilot’s windshield heat

40
Q

Is the center windshield heated?

A

No

41
Q

What does the window defog work?

A

18 psi bleed air is routed to the center windshield and side windows

42
Q

Windshield wipers are powered by what?

A

Their respective essential bus

43
Q

In slow position, the wipers operate at what speed?

A

Half of max speed

44
Q

In the PARK position, what do the wipers do?

A

Automatically park on the divider post

45
Q

Max speed for wiper use?

A

125 KIAS

46
Q

Pitot tubes and SAS heat are powered by what?

A

Respective essential bus. SAS is powered by left essential bus.

47
Q

Will the SAS vane work if the R PITOT & SAS HEAT is switched on?

A

Yes. It doesn’t matter which side calls for pitot/SAS heat.

48
Q

Should you use extended PITOT & SAS HEAT on the ground?

A

No

49
Q

For flight into icing conditions what should be operational?

A
  1. Engine and prop heat
  2. Pitot and SAS heat
  3. Windshield heat (HIGH)
  4. Wing and horizontal stabilizer deice boots
  5. Continuous ignition in the AUTO position
50
Q

Continuous ignition should be used when?

A
  1. Icing conditions
  2. Contaminated runway
  3. Turbulence
  4. Precipitation
51
Q

Does turning on PITOT & SAS HEAT guarantee heat to the SAS vane?

A

No

52
Q

For flight into known icing conditions, what should you do to compensate?

A
  1. Increase Vmc by 5 KIAS
  2. Increase approach speed by 19 KIAS
  3. Limit landing approach angle to max of 3 degrees

Sierra West Airlines (16 decks)

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