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Atlas Air B767 > Air Systems > Flashcards

Air Systems Flashcards

1
Q

COMPT TEMP digital readout with regards to PACKS?

A

PACKS will target temp for coldest COMPT (zone) and use TRIM AIR to regulate heat to other two zones.

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2
Q

COMPT TEMP ZONE INOP light means?

A

S - SWITCH OFF

O - OVERHEAT (Duct)

F - FAULT (Controller)

T - TRIM AIR OFF

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3
Q

Selecting TRIM AIR OFF does what?

Indications? Target Temp?

A

TRIM AIR VLV commanded to CLOSE.

All 4 compartment TEMP INOP lights illume.

Cabin auto temp controller will attempt to maintain 75F.

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4
Q

RECIRC FAN purpose?

A

Reduce ENG BLEED AIR demand by recirculating recycled cabin air. 50% of cabin air is recirculated.

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5
Q

RECIRC FAN locations?

A
  • L - Exhaust duct of FWD EE
  • R - AFT Cabin
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6
Q

RECIRC FAN light Indications?

A
  • ON - Operating
  • INOP - OFF
  • BOTH - Failure or Inhibit*

<em>*BOTH SHUT OFF w/ FWD or AFT CARGO FIRE ARMED switch pushed</em>

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7
Q

What happens to PACKS with RECIRC FAN OFF?

A

Respective PACK will operate in HI FLOW

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8
Q

PACK OFF Light indicates?

A

PACK VALVE is CLOSED

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9
Q

3 reasons for PACK OFF light?

A
  1. OFF
  2. Pack Trip (Internal Overtemp)
  3. Loss of air due to ENG BLD VLV closed
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10
Q

3 reasons for PACK INOP light?

A

INOP LIGHT ONLY:

  1. PACK OUTLET HI TEMP
  2. PACK AUTO TEMP CONTROLLER FAIL

INOP + PACK OFF LIGHT:

PACK OVERHEAT

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11
Q

PACK RESET switches reset what equip?

A

PACK TEMP CONTROLLER

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12
Q

Will PACK continue operation with HI PACK OUTLET TEMP and what are indications?

A

Yes, but PTC will set full cold position.

INOP light illumes.

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13
Q

Will PACK continue operation with internal PACK OVHT and what are indications?

A

No, the PACK will auto-shutdown

  • INOP light illumes
  • PACK valve closes
  • PACK OFF light
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14
Q

Will PACK continue operation with AUTO TEMP CONTROLLER FAIL and what are indications?

A

YES, same as PACK HI OUTLET TEMP:

  • PACK continues operation
  • INOP light illumes.

<em>*</em><em>Unlike HI TEMP OUTLET, the pack maintains existing position to maintain temp.</em>

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15
Q

How can we tell if we’ve had HI PACK OUTLET TEMP vs AUTO TEMP CONTROLLER failure?

A

When STBY is selected:

  • INOP EXTINGUISH = AUTO TEMP CONT FAIL
  • *Reset is not available and manual mode is required.*
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16
Q

PACK STBY Switch target temperatures?

A
  1. C - 65F/18C
  2. N - 75F/24C
  3. W - 85F/29C
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17
Q

When will a single PACK increase airflow (HI-FLOW)?

A
  • Opposite PACK is OFF
  • Respective RECIRC FAN is OFF
  • ON GROUND w/ APU or EXT AIR provided
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18
Q

When is PACK HI-FLOW inhibited?

A
  • Inflight Single Engine Ops
  • AFT/CARGO FIRE ARM Pressed
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19
Q

EE Config before start (below 7C)?

A

CLOSED LOOP

  • INBD SUPPLY VLV OPEN
  • EXHAUST VLV CLOSED
  • HEAT EXCH VALVE OPEN
  • BOTH FANS ON
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20
Q

EE Config before start (above 7C)?

A

OPEN LOOP - VENT OVERBOARD

  • INBD SUPPLY VLV OPEN
  • EXHAUST VLV OPEN
  • HEAT EXCH VLV CLOSED
  • BOTH FANS ON
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21
Q

EE Config after start?

A

INFLIGHT CLOSED LOOP CONFIG*

  • SUPPLY VLV CLOSED
  • BOTH FANS ON til Airborne
  • HEAT EXCH VLV OPEN

*Allows for the cabin to pressurize.

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22
Q

EE VALVE light?

A

Any valve not in commanded position.

Select STBY–configures system to inside closed loop

IF light on after 30 sec, Overboard Exhaust Valve may be open

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23
Q

EE OVHT light?

A

LOW AIR/HI HEAT (Exhaust Fan FAIL)

  • Selector to STBY will energize SUPPLY FAN to re-establish airflow
  • OVHT light inhibited for 5 minutes
24
Q

EE Switch to OVRD?

A
  • OVHT light deactivated
  • NO COOLING light inhibited for 1 minute
  • All VLV + Fans deactivated except…
  • Manifold VLV opens to provide direct flow of conditioned air. Smoke/Override VLV provides exhaust path via differential pressure.
25
Q

EE Panel SMOKE light?

A
  • EE system SMOKE DETECTOR has detected smoke
  • Select OVRD as described above
26
Q

EE NO COOLING light?

A

STBY BUS equipment reliable for 90 mins only

Other equip may FAIL imminently

<em>*light initially inhibited for 1 minute after selecting OVRD</em>

27
Q

CARGO HEAT sources?

A

AFT/BULK - BODY DUCT

FWD - CROSSFEED DUCT

28
Q

CARGO HEAT ON/OFF? Target TEMP?

A
  • OPENS/CLOSES respective SOV
  • Temp Auto maintained above 45F/7C
29
Q

CARGO HEAT OVHT illumes when?

A
  • Temp above 90F/32C
  • Associated valve CLOSES
  • EICAS CARGO OVHT
30
Q

BULK CARGO HEAT to VENT?

A
  • Required for carrying live animals in bulk compartment.
  • Raises TEMP to minimum 65F via FAN
31
Q

How is CABIN ALTITUDE MODE selected?

How is it powered?

A

Manually via switch on panel before every leg.*

  • AUTO = AC
  • MANUAL = DC

<em>*FO sets based on PM/PF</em>

32
Q

CABIN ALT CONTROL AUTO RATE index mark?

A

500FPM CLIMB
300FPM DESCENT

33
Q

At what altitude is max cabin differential pressure achieved?

A

FL350 (8.6PSI)

*will maintain 8.6PSI for altitudes above

34
Q

When does PRESS system enter cruise mode?

A

When altitude remains constant for 1 minute.

35
Q

The PRESS system maintains cruise mode until?

A

A climb or descent of more than 500’

36
Q

When does pressurization system enter descent to LND ALT?

A

When a descent of 1,000’ or more is initiated from cruise mode.

*schedules LND at .0125psi

37
Q

What will re-establish PRESS cruise mode?

A

A level off of more than one minute

38
Q

What happens if PRESS SYS1 or SYS2 fails?

A

Auto switching occurs without manual selection

*STATUS prompt on lower EICAS screen CABIN ALT AUTO 1/2

39
Q

AUTO INOP light of PRESS system?

A
  • Both auto modes have failed.*

or

  • MANUAL mode selected

<em>*accompanying EICAS message “CABIN AUTO INOP”</em>

40
Q

CABIN ALT light illumes? Extinguishes?

A

Above 10,000’ cabin altitude

Below 8,500’ cabin altitude

41
Q

OUTFLOW VALVE power source?

A

DC PWR

42
Q

Will outflow valve auto close at 11,000’ cabin altitude in AUTO and MANUAL modes?

A

YES

<em>*but it’s aircraft specific</em>

43
Q

APU BLEED AIR available in flight?

A

Up to 17,000’

44
Q

APU VALV Light?

A

Valve not in commanded position

*normally in transit.

45
Q

L/R/C ISOLATION VLV normal config in flight?

A
  • LEFT = CLOSED
  • RIGHT = CLOSED
  • C = (GUARDED) OPEN to supply C manifold with L/R air through check valves.
46
Q

L/R DUCTS provide air to what systems?

A
  • PACK
  • WING A/I
  • HYD RESERVOIR
  • ENG START VLV for APU and X-BLEED starts
47
Q

C BODY DUCT provides air to what systems?

A
  • C HYD ADP
  • AFT/BULK CARGO HEAT
  • C HYD RESERVOIR
48
Q

C DUCT LEAK can’t be isolated via switches, so what time limit must be observed for in-flight non-normal?

A

6 HRS

49
Q

GROUND AIR operation and requirements?

A
  • Connected directly at 2 inputs in L DUCT
  • Both connectors are required for adequate supply
  • All 3 isolation VLVs must be OPEN
50
Q

DUCT LEAK light?

A

A HI TEMP bleed air leak is detected in the respective duct. There’s a light for each.

51
Q

Primary reason for BLEED panel light?

A
  • PRV or HPSOV OPEN when should be CLOSED
52
Q

OVHT light?

A

Bleed air OVHT downstream pre-cooler

  • ENG BLD VLV will auto-CLOSE
  • HPSOV will auto-CLOSE
  • PRV will auto-CLOSE
  • ENG A/I still available via PRV, if req’d
53
Q

Engines are supplied air via _____ for normal starts?

A

APU

<em>*even if opposite ENG running. Its BLD will be forced OFF for start.</em>

54
Q

What equip is lost by isolating BODY DUCT LEAK?

A

Lose ADP so we lose HDG

55
Q

Which electrical bus powers the outflow valve when in MANUAL mode?

A

Battery Bus

Atlas Air B767 (16 decks)

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