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BBD700 > BBD-700 Integrated Air Management > Flashcards

BBD-700 Integrated Air Management Flashcards

1
Q

What is the pack discharge temperature range for manual mode operation?

A

+5° C to + 60° C

One pack must be selected “off”

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2
Q

What is Normal and Maximum Cabin differential pressure?

A

Normal – 10.33 PSID
Maximum – 10.73 PSID
“Delta P” message – 10.85 PSID

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3
Q

What is the maximum negative relief differential pressure?

A

-0.5 PSID

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4
Q

On taxi and takeoff the cabin PSID should not exceed this value?

A

0.1 PSI

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5
Q

On landing the cabin PSID should not exceed this value?

A

1.0 PSID

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6
Q

AUX PRESS is prohibited above what altitude?

A

41,000 Feet

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7
Q

The Bleed Management Controllers (BMCs) extract bleed air from which engine ports?

A

5th stage low-pressure port

8th stage high-pressure port

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8
Q

During ground operation, what is the priority bleed source for engine starting?

A

APU bleed air

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9
Q

How are hot air (bleed) leaks monitored in the airplane?

A

Dual loop detection sensing elements connected to the BMCs

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10
Q

What occurs when the BMC detects a bleed air leak?

A

The BMC isolates the affected manifold by closing the appropriate valves

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11
Q

How is air flow regulated from the pneumatic duct to the air conditioning units?

A

By modulation of the flow control valve (FCV) by the air conditioning system controllers (ACSC)

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12
Q

Can one engine supply two AC packs simultaneously?

A

No, the BMC prevents two packs from being supplied by one engine
In the case of single pack operation, the high flow schedule is automatically selected by the BMC

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13
Q

What are the two functions of the air conditioning units?

A

Decrease the air temperature and

Decrease the water contained in the hot bleed air

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14
Q

When are the packs automatically shut off (FCV closed)?

A 
Bleed failure, shutdown or engine starting
Ditching operation (below 15,000 feet)
Pack inlet overheat
Compressor discharge overheat
Pack discharge overheat or under pressure
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15
Q

Turning the TRIM AIR switch to the ON position opens which valves?

A

Hot air shutoff valves (HASOV)

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16
Q

What are the two functions of the RAM AIR system?

A

Provide cooling for the heat exchangers of the cooling packs

Alternate source of fresh air at an altitude of 15,000 feet or less

17
Q

What are the requirements for using AUX Press?

A

Both cooling packs inoperative
Recirculation system maintained “ON”
Prohibited above 41,000 feet

18
Q

What are the typical cabin altitudes for 51,000 and 45,000 feet aircraft altitude?

A

51,000 feet – 5,670 feet

45,000 feet – 4,500 feet

19
Q

What are the two modes of operation with the cabin pressure control system in AUTO?

A 
PRIMARY mode (predictive) uses
FMS programmed
Autopilot and VNAV engaged
SECONDARY mode (reactive) uses
Pressure altitude
Vertical speed
20
Q

What are the warning messages and associated cabin altitudes for loss of pressurization?

A

CAB ALT – 8200 Feet
CAB ALT Warning – 9000 Feet
Or 1000 / 1800 Feet above landing alt if landing above 7230 MSL

21
Q

When selecting MAN pressurization, what is displayed on the STAT page

A

Both outflow valve position indicators

Cabin rate analog gauge

22
Q

What is required to display the LDG ELEV in magenta on the STAT page?

A

LDG ELEV FMS/MAN selector set to FMS
Landing destination programmed in the FMS
Flight plan activated

23
Q

What are the two cabin rate selections available in automatic and associated rates?

A

Normal mode – 500 ft/min climb and 300 ft/min descent rate

High mode- 800 ft/min climb and 800 ft/min descent rate

24
Q

What occurs when EMER DEPRESS switch is selected ON?

A

Both out flow valves (OFVs) are commanded open

Cabin altitude limited to 14,500 feet

25
Q

What does the selecting the Ditching switch to “ON” provide?

A

PACKS flow is shut off
Cabin is depressurized
OFVs are driven to the closed position
Sequence is inhibited above 15,000 feet

26
Q

What is the purpose of the safety valves (SFV 1 and 2) located in the aft bulkhead?

A

Ensures overpressure and negative pressure relief

Provides an OPEN position signal to the EICAS

BBD700 (22 decks)

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