Air Systems Flashcards

1
Q

When does the Equipment Cooling configure for flight?

A

With one or more engines on each wing operating.

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2
Q

On the ground, when is warm equipment cooling air ducted overboard? (3 Items)

A

Engines not Operating,
Equipment Cooling Selector in ‘NORM’, and
Warm ambient temperatures.

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3
Q

Equipment Cooling provides cooling air for what systems? (2 Items).

A

Flight Deck Instruments, and
Electronics and Equipment Racks.

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4
Q

How can you manually configure the Equipment Cooling system for flight?

A

Positioning the Equipment Cooling Selector to ‘STBY’.

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5
Q

What is the function of the Lower Lobe Cargo Conditioned Air Flow Rate Selector knob?

A

To provide airflow and conditioned air to the lower cargo lobes.

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6
Q

What happens when a fault is detected in a Pack Temperature Controller (PTC)?

A

Control of the respective pack(s) revert to the operational PTC.

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7
Q

How many PTC’s are there?

A
  1. A & B.
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8
Q

On the 747-8, with the Main Deck and FWD & AFT lower lobe temperature selectors set to ‘OFF’ what is the temperature zone target?

A

20 deg C (68 deg F).

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9
Q

On the 747-8, the Nitrogen Generation System (NGS) converts engine Bleed Air to Nitrogen Enriched Air for what purpose?

A

To reduce the flammability of fuel in the CWT.

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10
Q

On the 747-8, what is the purpose of the Alternate Ventilation system when all packs are off, and the aircraft is depressurized?

A

To provide ambient airflow to the flight Deck.

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11
Q

On the 747-8, what position are the ‘MAIN DECK FWD & AFT’ temperature selector switches normally placed in during preflight?

A

OFF.

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12
Q

On the 747-8, unless required, what position is the Lower Lobe Cargo Conditioned Air Flow Rate Selector switch placed in during preflight?

A

LOW.

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13
Q

On the 747-8, the ‘TEMP DEV CARGO LO (HI)’ EICAS Message indicates what?

A

Temperature deviations of +/- 5°C (9°F).

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14
Q

On the 747-8, what temperature in the LO and HI position will the Lower Lobe AFT CARGO HEAT maintain?

A

LO = 4°C (40°F).
HI = 10°C (50°F).

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15
Q

The 747-8 ECS Left & Right Trim Air provides airflow to which zones?

A

Left = Flight Deck, Upper Deck, Crew Rest, AFT Main Deck.
Right = FWD Main Deck, FWD LL, AFT LL.

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16
Q

In decent mode, upon landing, will the Cabin Altitude Controllers (CAC’s) provide a positive or negative pressure inside the aircraft?

A

Upon landing, the CAC’s will command a slight positive pressure to ensure doors can be opened in the event of an evacuation.

17
Q

What action would allow manual operaton of the pressurization system?

A

Turning both Outflow MAN switches ON
(This bypasses all Cabin Pressurization Protections).

18
Q

When do the CAC’s switch to the secondary CAC? (2 Items)

A

Automatically upon touchdown, and
In the event of a CAC failure.

19
Q

How many CAC’s does the 747 have?

A
  1. A & B.
20
Q

How can you gain manual control of the landing altitude?

A

By selecting the LANDING ALT switch.

21
Q

What does the Zone SYS Fault light indicate? (3 Items)

A

Zone Duct overheat or fault detected, or,
Master Trim Air Valve failed closed, or,
Master Trim Air Valve closed and pack air continues to flow.

22
Q

When is HP Bleed Air used? (2 Items)

A

Descent, or,
Other low power setting operations.

23
Q

How do you isolate a bleed duct section in the event a bleed duct leak is detected?

A

By following the QRH. It will direct you to close isolation valves, and/or engine Bleed valves.

24
Q

What does a Bleed Duct ISLN VALVE (Amber) light indicate?

A

Isolation Valve position doesn’t agree with switch position.

25
Q

When Bleed Air pressure is available, the ‘ENGINE BLEED’ switches control which valves by system logic? (3 Items)

A

HP Valve,
Engine Bleed Valve, and
PRV

26
Q

Describe the basic function of the PRV.

A

To reduce the pressure of engine bleed air to prevent damage to ducting and equipment downstream.

27
Q

Under what conditions would Intermediate Pressure (IP) bleed air be used?

A

During situations requiring high power settings.

28
Q

With a right duct isolated, how would this affect the hydraulic systems? (2 Items)

A

Hydraulic Demand Pump 4 turned off (QRH Action), and
No reservoir pressure for Hydraulic systems 3 & 4.

29
Q

With a right bleed duct isolated, how would the affected Leading Edge flaps extend?

A

Electrically, in secondary mode.

30
Q

With the STARTER CUTOUT 1, 2, 3, 4 EICAS Message shown, would NAI be available?

A

No.

31
Q

With the STARTER CUTOUT 1, 2, 3, 4 EICAS Message shown, would NAI be available?

A

No.