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B747 PC Slides Atlas Air > Air Systems > Flashcards

Air Systems Flashcards

1
Q

When does the equipment cooling configure for flight?

A

One or more engines on EACH WING is operating

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2
Q

On the ground, when is warm equipment cooling air ducted overboard?

A
  • Engines not operating
  • equipment cooling selector in NORM
  • ambient temperature moderate or high
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3
Q

Equipment cooling provides cooling air for what compartment and systems

A
  • Flight Deck Equipment
  • Electrical and Equipment racks (E&E)
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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?

A

Provides forward and aft cargo lobe conditioned air

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6
Q

What happens if a pack temperature controller (PTC) detects a fault in a pack channel?

A

Control of the respective pack switches to the other PTC

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7
Q

How many pack temperature controllers (PTC) are provided?

A

Two - A and B

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8
Q

On the 747-8 with Main Deck and FWD/AFT lower lobe temperature selector in the OFF position what is the temperature zone target?

A

68F/20C

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9
Q

747-8 the Nitrogen Generation System converts bleed air to nitrogen enriched air for what purpose?

A

Reduce flammability of center wing tank fuel.

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10
Q

On the 747-8, what does the alternate ventilation system provide with Pack 1+2+3 shutdown and the airplane depressurized?

A

Outside air into the flight deck

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11
Q

ON the 747-8, what position are the MAIN DECK FWD and AFT TEMP selectors normally placed in during preflight

A

OFF

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12
Q

On the 747-8, what position is the LOWER LOBE AFT CARGO HT selectors normally placed during preflight?

A

LOW

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13
Q

On the 747-8, the TEMP DEV CGO advisory message HI or LO respectively indicate?

A

HI - 9F/5C higher than selected temperature
LO - 9F/5C lower than selected temperature

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14
Q

The 747-8 LLACHS regulates temperature contorl valve to maintain at least __F/__C in LOW and ___F/____C in HIGH position?

A

40F/4C
50F/10C

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15
Q

The 747-8 ECS Left and Right Trim air is provided to which temperature zones?

A

LEFT TRIM AIR
-flight deck
-upper deck
-crew rest
-aft main deck

RIGHT TRIM AIR
-forward main deck
- forward lower lobe
- aft lower lobe

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16
Q

When in the descent mode, will the cabin altitude controllers program a positive or a negative pressurizaiton at touchdown

A

-Small positive pressurization at touchdown

17
Q

What action would allow manual operation of the pressurization ssytem?

A

Turn both Outflow Manual switches to ON
-all automatic cabin altitude control functions are bypassed

18
Q

When does the cabin altitude controller switch from controllers? (i.e. A to B)

A

-Automatically selects A or B on alternate flights
- Will switch automatically if the other fails

19
Q

How many cabin altitude controllers are provided?

A

Two controllers A and B
- controller controls both outflow valves

20
Q

How can you gain manual control of landing altitude?

A

By pushing the LDG ALT switch

21
Q

What does the Zone System (SYS) Fault Light indicate? (3)

A
  • Temperature zone duct overheat or zone temperature controller fault has occurred
  • master trim air valve failed closed
    -master trim air valve closed and pack air continues to flow
22
Q

Under what conditions would High Pressure (HP) air be used?

A
  • Descent
  • Other low power setting operations
23
Q

How would you isolate a bleed air duct section in the event of a bleed duct leak is detected?

A
  • close the respective isolation valve
    -close the engine bleed air valves
24
Q

What does a bleed duct isolation (ISLN) VALVE light indicate?

A

Isolation valve position disagrees with the switch position

25
Q

When bleed air pressure is available, the Engine Bleed Air Switches control which valves by system logic?

A

-PRV
-HP Bleed Valve
-Engine Bleed Air Valve

26
Q

Describe the general function of pressure regulating valve (PRV)

A

Prevents damage to ducting and equipment downstream by limiting bleed air pressure.

27
Q

Under what conditions would Intermediate Pressure by used?

A

High power settings

28
Q

With a right duct isolated, how will this affect the hydraulic systems?

A
  • Hydraulic demand pump 4 is turned OFF
  • No Hydraulic system 3 and 4 reservoir pressure
29
Q

With the EICAS message STARTER CUTOUT 1,2,3,4 shown, will Nacelle anti-ice be available for the related engine?

A

NO

30
Q

With a right duct isolated, how will the leading edge flaps extend?

A

The right wing LEF operate electrically in secondary mode
- EXPECT FLAPS PRIMARY EICAS

B747 PC Slides Atlas Air (15 decks)

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