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Call of the Heavies Ev > Air Systems > Flashcards

Air Systems Flashcards

1
Q

Engine Bleed Air Switches ON commands…

A

1.Engine bleed air valve open for engine start
2. Engine bleed air valve, PRV, and High Pressure bleed valve open by system logic when bleed air pressure is available

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2
Q

Engine bleed air switches off commands…

A

1.Engine bleed air valve, PRV, and High Pressure bleed valve closed
2. PRV valve opens when nacelle anti ice is on unless PRV is closed by:
-Prior or present bleed air overheat
-start valve not closed
-HP bleed valve failed open

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3
Q

Engine bleed switches are ___ controlled but ___ operated

A

electrically controlled but pneumatically operated

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4
Q

Bleed air system fault lights illuminate amber when

A
  1. Bleed air overheat
  2. Bleed air overpressure
  3. HP bleed valve open when commanded closed
  4. PRV open when commanded closed
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5
Q

Bleed air isolation valve light will illuminate amber when

A

Isolation valve disagrees with switch position

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6
Q

Engine bleed air valve illuminate amber when

A

Engine bleed air valve is closed

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7
Q

APU bleed air switch air valve light illuminated amber when

A

APU bleed air isolation disagrees with switch position

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8
Q

How many packs are there

A

3

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9
Q

If any pack fails for any reason, the remaining packs will go to

A

High flow

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10
Q

FLT Deck fan switch on with no packs operating

A

recirculated cabin air supplied to flight deck

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11
Q

FLT Deck fan switch on with at least one pack operating

A

Increases flow of conditioned air to flight deck
-Fan is disabled in flight

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12
Q

Flight deck temperature selector temp range

A

65F or 18C to 85F or 29C

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13
Q

Flight deck temp selector in backup mode

A
  1. sets and average flight deck temo from 18C to 29C
  2. Cabin temp panel control of zone temps is inhibited and automatic control of main deck zone temp is inhibited
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14
Q

Flight deck temp selector in Auto

A

Provided automatic control of flight deck temp

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15
Q

Flight deck temp selector in MAN the ___ valve is controlled manually

A

flight deck trim air. C moves valve closed provided cooler air and W moves valve towards open

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16
Q

Zone reset switch illuminates amber when

A
  1. Temperature zone duct overheat or zone temp controller fault occurs
  2. Master trim air valve is failed closed
  3. Trim air switch off
  4. Master trim air valve closed and pack air continues to flow
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17
Q

Zone reset switch push in

A
  1. Reset zone temperature controller if fault no longer exists
  2. Reopens master trim air valve if duct overheat no longer exists
  3. Reopens forward or after lower lobe cargo trim air shut off valve if duct overheat no longer exists
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18
Q

What is trim air?

A

Trim air add specific amounts of bleed air to any zone so that the temperature of each zone may be independently warmed

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19
Q

Trim air switch on allows for

A
  1. The master trim air valve to be open and flight deck, upper deck, crew rest and main deck zone trim air valves operate automatically
  2. Automatic and manual selection of pack controller A or B enabled
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20
Q

Trim air Switch OFF

A
  1. Master trim air valve is closed
  2. Forces pack output temp in backup mode and packs produce an average temp between 18C and 29C
  3. Cabin temp panel control of Crew rest and upper deck zones inhibited
  4. Pack controller A is selected and both automatic and manual selection of controller B is inhibited unless pack controler A fails which automatic selection of controller B occurs
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21
Q

Main deck temp selectors in AUTO

A
  1. Provides automatic control of main beck conditioned air temps.
  2. sets temp from 40F (4C) to 85F (29C)
  3. In back up mode automatic control is inhibited
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22
Q

Main deck temp selectors in manual

A

Main deck trim air valve is controlled manually

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23
Q

Forward lower lobe temp selector in Auto

A
  1. Provides automatic control when lower lobe cargo conditioned air flow rate selector in FWD HIGH, BOTH LOW or FWD LOW
  2. Rage is 40F (4C) to 85F (29C)
24
Q

Forward lower lobe temp selector MAN

A
  1. Controlled Manually when selected in 6 o’clock position and lower lobe cargo conditioned air flow rate selector in FWD HIGH, BOTH LOW or FWD LOW
  2. Resets forward lower lobe cargo conditioned air supply duct shut off valve if closed by duct overheat
25
Q

Aft lower lobe temp selector Auto

A
  1. Provides automatic control when lower lobe cargo conditioned air flow rate selector in FWD HIGH, BOTH LOW or FWD LOW
  2. Rage is 40F (4C) to 85F (29C)
26
Q

Aft lower lobe temp selector MAN

A
  1. Controlled Manually when selected in 6 o’clock position and lower lobe cargo conditioned air flow rate selector in FWD HIGH, BOTH LOW or FWD LOW
  2. Resets forward lower lobe cargo conditioned air supply duct shut off valve if closed by duct overheat
27
Q

Equipment Cooling Selector STBY

A
  1. Ground exhaust valve is closed
  2. Automatic control bypassed to configure system for flight: inboard exhaust valve open
  3. With a single internal fault, equipment inboard exhaust valve closes and cooling system reconfigures to allow internal closed loop recirculation of cooling air
28
Q

Equipment cooling selector NORM ground operation is based on what

A
  1. Ambient temp, position of lower lobe cargo conditioned air flow rate selector, temperature selected by the forward lower lobe cargo temp selector
  2. Equipment cooling air is either thrown overboard or exhausted into forward cargo compartment
29
Q

Equipment cooling selector NORM with two or more engines running and lower lobe cargo conditioned air flow rate selector in OFF, AFT LOW or AFT HIGH, cooling air is…

A

exhausted into forward cargo compartment and ground exhaust valve is closed

30
Q

Equipment cooling selector NORM with two or more engines running and lower lobe cargo conditioned air flow rate selector in FWD LOW, BOTH LOW or, FWD HIGH and forward lower lobe cargo temp selected is less than 50F (10C)…

A

inboard exhaust valve is closed and equipment cooling air recirculated in a closed loop mode

31
Q

Equipment cooling selector NORM and a single internal fault…

A

Equipment inboard exhaust valve closes and cooling system configured to allow internal closed loop recirculation

32
Q

Equipment cooling selector OVRD

A
  1. Inboard exhaust valve closed
  2. Ground exhaust valve closed
  3. equipment supply valve closed : cooling air supplied through flight panels
  4. Smoke/ override valve open: differential pressure exhausts cooling air overboard
33
Q

Pack high flow switch on

A

1.All packs configured to high flow
2. EICAS memo message PACKS HIGH FLOW displays

34
Q

Pack high flow off (lower lobe cargo conditioned air flow rate selector in HIGH OR BOTH LOW)

A

No effect on pack flow rate, All remain in HIGH flow

35
Q

Pack high flow off (lower lobe cargo conditioned air flow rate selector in FWD LOW)

A

Packs one and two controlled automatically. Pack three remains in high flow

36
Q

Pack high flow off (lower lobe cargo conditioned air flow rate selector in AFT LOW)

A

Packs one and three controlled automatically. Pack two remains in high flow

37
Q

Pack high flow off (lower lobe cargo conditioned air flow rate selector in OFF)

A

ALl packs controlled automatically

38
Q

Aft Cargo Heat Switch ON

A
  1. Overheat shutoff valve opens to provide bleed air to aft and bulk cargo compartments
  2. Temperature control valve closes and opens to maintain temperature
  3. Overheat shutoff valve closes and opens for overheat protection
39
Q

Aft cargo heat off

A

Shuts off cargo hear bleed air to compartment

40
Q

AFT cargo temp light illuminates amber when

A

1.Compartment temp excessive
2. Overheat shutoff valve closes

41
Q

PACK reset switch push in

A
  1. Resets pack fault protection system
  2. Restarts pack after automatic shutdown if fault no longer exists
42
Q

PACK system FAULT light illuminates amber when

A
  1. Pack overheat or other system fault occurred
  2. May illuminate briefly when automatic or manual switching from pack temp controllers A to B or B to A
43
Q

Pack control selector OFF position

A
  1. Pack valve is closed
  2. Extinguishes pack system fault light for selected pack
  3. Resent pack fault protection system
44
Q

Pack control selector NORM

A
  1. Pack controler A or B selected automatically and alternated with flights
  2. Selected secondary pack controller if primary fails
45
Q

Pack controler selected A or B

A

Selects pack to either A or B and if selected pack fails then automatic selection the working pack controller occurs

46
Q

Lower Lobe Cargo Conditioned air flow rate selector OFF

A
  1. Forward and aft lower lobe cargo air conditioning of
  2. Resent lower lobe cargo conditioned air supply duct shut off valves if valves closed by duct overheat
47
Q

Lower Lobe Cargo Conditioned air flow rate selector: FWD LOW

A

Two thirds of pack three conditioned air is distributed to FWD lower lobe cargo compartment

48
Q

Lower Lobe Cargo Conditioned air flow rate selector AFT LOW

A

Two thirds of pack two conditioned air is distributed to AFT lower lobe cargo compartment

49
Q

Lower Lobe Cargo Conditioned air flow rate selector BOTH LOW

A

Two thirds of pack three and pack two conditioned air is distributed respectively to FWD and AFT lower lobe cargo compartment

50
Q

Lower Lobe Cargo Conditioned air flow rate selector FWD HIGH

A

All pack three conditioned air is distributed to FWD lower lobe cargo compartment

51
Q

Lower Lobe Cargo Conditioned air flow rate selector AFT HIGH

A

All pack two conditioned air is distributed to AFT lower lobe cargo compartment

52
Q

Shoulder Heater switch

A

HI or LO activates and electric heater and adds heat to conditioned air flow to side windows

53
Q

FOOT heater switch

A

HI or LO activates underfoot electric heater. Inhibited at temps warmer than 65F or 18C

54
Q

Landing altitude switch push

A

Alternates between automatic and manual

55
Q

Landing altitude switch in manual mode:

A

Landing alt is set by rotating landing alt selector and displayed on EICAS as well as LANDING ALTITUDE on EICAS

56
Q

Outflow MAN L and MAN R ON:

A

Outflow is controlled manually by outflow valves manual control

57
Q

How many cabin altitude controls are there

A

Two. Switch alternating flights. Same logic as PTCs

Call of the Heavies Ev (11 decks)

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