E190 - Air management system Flashcards by Steven Poelmans

The AMS has … channels. In case of a channel failure, all systems keep working normally.

Two.

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If the bleed air button illuminates amber, it means:

A leak is detected.

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If you press the DUMP switch:

Packs and recirculation fans are turned off.- Outflow valve is opened to maintain a cabin ROC of 2,000 fpm until a cabin altitude of 12,400 ft. Then the outflow valve is fully closed (cabin altitude still increases due to natural leak).

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What happens if you press the DUMP switch a second time ? What happens if you press the DUMP switch if pressurization is set to MAN ?

All systems normal againNothing.

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What is the meaning of the HI FIELD indication ?

Airports > 8,000 ft. The cabin altitude warning point is shifted above it’s original value of 9,700 ft, by +500 ft added to the elevation.

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One of the bleed flow lines is amber. This means:

An overheat condition.

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Engine bleed air temperature is regulated by:

The precooler and the FAMV (fan air modulating valve.

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The EBV is commanded open when:

Engine bleed is available- Switch in AUTO- No fire or no duct leak.

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What happens if an engine bleed duct overpressure, leak of fail condition is detected ?

The eng bleed is automatically shut down.

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The ABV is commanded open when:

APU bleed is available- Switch in AUTO- L engine bleed is NOT available- A/I is NOT requested
No duct leak

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The XBV is commanded open when:

No bleed source on the opposite side- X bleed starts (flight/ground)- No duct leak

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Is the AUTO switching of bleed sources and crossbleed automatic for duct leaks ?

Yes.

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What happens if the Xbleed valve fails open ?

EBV1 will be commanded closed if engine bleed 2 is available.

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The ODS provide detection of … and … . Normally the sensors are in a … loop configuration.

leaks and overheatdual loop.

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The engine is used, in auto configuration, as priority bleed source if:

ECS is selected on

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The APU is used, in auto configuration, as priority bleed source, on the ground, if:

SETI- ECS is OFF and AI/I is OFF

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Is it possible to have both the APU and the engines as bleed sources simultaneously ?

No.

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In case of an ECS OFF T/O, at what point are the engine bleeds enabled again ?

At 500 ft.

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In case of single pack operations, does the temperature selector associated with the disabled pack still have any effect ?

No.

The gaspers receive air from:

The mixer, or the R recirculation fan when the gasper shutoff valve opens (if gasper air > 35° C).

The recirculation fans are turned off when:

Both packs are OFF (or DUMP button)- Cabin warm-up with APU as bleed- Cargo fire- Smoke in recirculation bay

The fwd and center e-bay are ventilated by … fans each.

The fans draw air from the … (fwd e-bay) or the … (center e-bay) and expel this air to the ….

ThreeCockpitRear cabinRecirculation bay.

Are cooling fans installed in the aft e-bay ?

Emergency ram air ventilation (valve) is open if:

Both ECS packs are off, and- < 25,000 ft

What is the relation between the PACK and it's flow control valve ?

If the FCV is closed, the PACK is OFF.

An ECS pack is commanded OFF when:

- Bleed air is not available, or- PACK is switched off, or- In-flight engine start using cross-bleed, or- Duct leak or failures

Both ECS packs are commanded OFF for engine start when:

Engine start on the ground, orEngine start using the APU.

The RAM air valve BIT occurs during:

First engine start. It commands PACK 1 off.

The FADEC sends an ECS OFF (both packs off) signal during T/O when:Unless:

- 1# failure, or- T/L are set to MAX, or- ECS OFF T/OUnless APU bleed is available !

The FADEC sends an ECS OFF (both packs off) signal during GA when:

- 1# failure, or- T/L are set to MAX Unless APU bleed is available !

After a FADEC ECS OFF signal, the packs are recovered when :

- At 500 ft (ECS OFF T/O, 2 engines), or- T/L reduction below TO/GA, or- Above 9,700 ft (1#), or- Above 15,000 ft (1#, HI FIELD, T/O)

When is an airport considered high field ?

> 8,000 ft AGL

The CPCS has ... independent, automatic channels that alternate for every flight. Both channels provide a ... backup.

twomanual.

At which differential pressure does the positive/negative pressure relief valves open ?

Positive relief valve (safety valve): 8,6 psiNegative relief valve: -0,5 psi

The safety valve works in combination with a ... that senses the environmental pressure, that is electrically heated.

static pressure port.

If the FMS cruise altitude is set < 37,000 ft the max differential pressure is:

7,8 psi.

If the FMS cruise altitude is set > 37,000 ft, or the airplane is actually flying > 37,000 ft, the max differential pressure is:

8,4 psi.

During CPCS ground mode:

Outflow valve is fully open.

CPCS taxi mode is enabled when: The differential pressure will be:

- The doors are closed, and- N2 > 60% | 0,11 psi.

CPCS T/O mode is enabled when: The differential pressure will be:

T/O thrust is set0,15 psi.

CPCS climb mode is enabled when: The cabin rate will be:In case of a step climb:

Flight mode+750/-600 fpm FMS: The cabin altitude continues to increaseNon-FMS: cruise mode is activated.

CPCS cruise mode is enabled when: The cabin rate will be:

Cruise altitude / straight level (non-FMS)+500/-300 fpm.

The maximum cabin altitude is:

8,000 ft.

CPCS descent mode is enabled when: The cabin rate will be:

Descent after cruise activation-200/-750 fpm.

CPCS abort mode is enabled when: The cabin rate will be:

- < 10,000 ft, or- < 5,000 ft of departure airport, and - airplane stops climb, and - cruise mode not activated.