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yupi-s-TiSiTi. > Air Systems > Flashcards

Air Systems Flashcards

1
Q

Temperature range for the FLT DECK temperature seletor

A

65F-85F

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2
Q

The EQUIP COOLING selector is in NORM, the aircraft is on the ground, engines not running, and OAT is greater that 45F, what happens

A

Heated air is exhausted overboard via the ground exhaust valve

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3
Q

The forward equipment cooling system provides cooling air for flight deck equipment and the Electrical and Electronic (E&E) compartment racks. The Aft Equipment Cooling system is what?

A

Fully automatic

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4
Q

The AFT LOWER LOBE target temperature is displayed in magenta on the ECS synoptic when?

A

The LLCCAFR switch is moved from OFF to LOW AFT

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5
Q

The AFT LOWER LOBE temp selector is active when?

A

The LLCCAFR switch is moved from OFF to the LOW AFT position

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6
Q

The FWD LOWER LOBE target temp is displayed in magenta on the ECS synoptic when? When is the FWD LOWER LOBE temp selector active?

A

The LLCCAFR switch is moved from OFF to LOW FWD position

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7
Q

The PACK SYS FAULT light illuminates for what?

A

Pack overheat or other system fault

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8
Q

The zone SYS FAULT light illuminates for what?

A

A Zone Duct overheat

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9
Q

The AFT CARGO HT switch is normally OFF for engine start in order to do what

A

Increase the amount of bleed air available for engine start

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10
Q

Under normal conditions, all 3 packs will go to high flow when?

A

If the HI FLOW switch is pressed ON during cruise and after engine start to cruise altitude

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11
Q

If 1 pack is OFF, the other 2 packs automatically go to high flow. Two pack in high flow do what?

A

Burn less fuel than 3 packs in normal flow

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12
Q

What indication would the crew see in the event of a cabin overpressurization

A
  • Pack 2 shuts down;
    and
  • Cabin differential pressure indication is displayed on the Primary EICAS in red
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13
Q

How many temperature zones are their in the Freighter

A

7

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14
Q

The aircraft is on the ground, 2 or more packs are ON, one or more engines operating on each wing, LLCCAFR switch is OFF, what happens?

A

The ground exhaust valve closes

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15
Q

What is the temperature range for the MAIN DECK temp selectors and the LOWER LOBE temp selectors

A

40 - 85F

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16
Q

Selecting the pack High Flow switch to ON in cruise would increase fuel burn by how much?

A

0.3% per pack

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17
Q

Why is the Aft Cargo Heat switch left OFF until the AFTER START flow?

A

To provide more airflow for engine start

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18
Q

On the ground, with the engines not operating, the Equipment Cooling selector in NORM and the OAT is 75F what is the position of the ground exhaust valve?

A

Open

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19
Q

In flight with the Equipment Cooling selector in OVRD what provides the airflow for equipment cooling?

A

Cabin differential pressure

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20
Q

Inflight if the
L L C C A F R selector is in the:
FWD LOW and the FWD LOWER LOBE temp selector is set to 45F.
What is the configuration of the cooling equipment?

A
  • The inboard exhaust valve is closed;
    and
  • Equipment cooling air is recirculated in a closed loop mode.
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21
Q

When does the equipment cooling system configure for flight?

A

When one or more engines on each wing are operating

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22
Q

What does the advisory EICAS message
TEMP CARGO HEAT indicate?

A

Overheat detected in aft cargo compartment when aft cargo heat system is operating

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23
Q

What is the function of the positive and negative pressure relief valves

A

Protect the fuselage against excessive pressure differential

24
Q

If cruise altitude is unavailable from the FMC in AUTO the cabin altitude controllers assume what altitude?

A

39,000ft

25
Q

The cabin altitude limiter closes both outflow valves if cabin altitude exceeds what altitude?

A

11,000ft

26
Q

Why does the cabin altitude decrease to slightly below the FMC planned landing altitude in AUTO

A

The slight altitude difference assures a small positive pressurization at touchdown

27
Q

With the PACK Control Selectors in NORM, Pack controller A or B is selected:

A

Automatically on alternating flights

28
Q

If an ENGINE BLEED switch is selected OFF, what happens?

A

Bleed air, HP valve, PRV close the PRV will reopen if Nacelle Anti -ice, or reverse thrust are selected

29
Q

How many Pack Temp Controllers are available?

A

2 identical, A and B

30
Q

Assuming the right duct has been isolated (right isolation and bleed air 3 and 4 off).
What bleed system function are not available?

A
  • Hyd 4 demand pump;
  • Right primary LE flaps;
  • Right wing anti-ice;
  • Hyd 3 and 4 system reservoir pressure.
31
Q

If the left or right duct section is isolated, why would the HYD PRESS DEMAND EICAS alert message display during approach if the respective hyd demand pump selector was left in AUTO?

A

Demand pump commanded to run and demand pump output pressure is low.

32
Q

If the left or right duct section is isolated, how are the respective leading edge flaps operated?

A

Electrically

33
Q

If the center duct section is isolated on the freighter, what components would no longer be available?

A
  • Master trim air;
  • Aft cargo heat;
  • Cargo smoke detection;
  • Potable water;
  • Lower Lobe Trim Air.
34
Q

Assuming the #1 Engine Bleed Valve has be closed per the MEL and no abnormals are present, if the Nacelle Antiice is turned on for the #1 engine, which bleed system valves open?

A

1 PRV

35
Q

An engine Bleed Air SYS FAULT light illuminated on the Bleed Air Overhead panel would indicate one of the following?

A

Bleed air overheat

36
Q

With engines running and no abnormals in the pneumatic system, if the #4 engine bleed switch is selected off, which bleed system valve(s) close?

A

4 engine bleed air valve, PRV, HP

37
Q

During high power settings, air is supplied from which engine bleed section?

A

IP engine section

38
Q

Which system is inoperative if the Left or Right Bleed Duct section is isolated?

A

LE flaps primary operation
and
Wing Anti-ice.

39
Q

Which system is inoperative if the Center Bleed Duct section is isolated?

A

Freighter cargo smoke detection

40
Q

Which Bleed Duct section has overheat detection?

A

R, L, C

41
Q

With the EQUIP COOLING selector switch is NORM and the aircraft on the ground without the engines running and the OAT is less than 45F what happens?

A

Heated air is exhausted to the FLL via the Inboard Exhaust Valve

42
Q

What will cause the Bleed SYS FAULT light to illuminate?

A

Overheat, overpressure, HP/PRV open when commanded closed.

43
Q

With the aircraft on the ground, moving the EQUIP COOLING selector to STBY does what?

A

Configures the equipment cooling system for flight

44
Q

Selecting the ENGINE BLEED switch ON allows which of the following valves to open?

A

HP, PRV, Bleed air valve

45
Q

Which of the following use engine bleed air for operation?

A
  • Reversers
  • LE flaps
  • Cargo smoke detection (Freighter)
46
Q

Negative pressure relief valves are located where?

A

Side, FLL, ALL cargo doors

47
Q

If cabin pressure becomes excessive what will happen

A

One or both positive pressure relief valves open and pack 2 shuts down to assist in relieving excess cabin pressure

48
Q

If the cabin altitude exceeds approximately 14,000’ and the SUPRNMRY OXY switch is in NORM what will happen?

A

Oxygen masks deploy, and EICAS alert SUPRNMRY OXY ON displays

49
Q

If the cabin altitude exceeds 11000’ what will happen?

A

The cabin altitude limiter closes both outflow valves

50
Q

If cabin altitude exceeds 10000’ what will happen

A

EICAS warning appears, Master warning illuminates, warning siren aural sounds

51
Q

In Cabin Altitude Controller cruise mode, the maximum cabin altitude is normally what?

A

8,000’

52
Q

Pressurization control is what?

A

Fully automatic once route and cruise altitude are entered and executed

53
Q

Positioning the EQUIP COOLING selector to OVRD does what?

A

Allows differential pressure to draw conditioned air across the E&E bays via the Smoke Override Valve

54
Q

What conditions will cause the EQUIP COOLING system to go to closed loop operation?

A
  • Supply or Exhaust fan failure;
  • FLL temp less than 50F;
  • Main Deck Cargo Fire switch armed.
55
Q

In flight with the LLCCAFR selector in OFF how is the FLL heated

A

Heated air exhausted from the E&E compartment heats the forward cargo compartment

56
Q

What is the normal position of the Left and Right isolation valves?

A

Both open

57
Q

With the LLCCAFR selector positioned in BOTH LOW, how many packs are in HIGH FLOW?

A

3

yupi-s-TiSiTi. (24 decks)

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