E190 - Air management system Flashcards
The AMS has … channels. In case of a channel failure, all systems keep working normally.
Two.
If the bleed air button illuminates amber, it means:
A leak is detected.
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).
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.
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.
One of the bleed flow lines is amber. This means:
An overheat condition.
Engine bleed air temperature is regulated by:
The precooler and the FAMV (fan air modulating valve.
The EBV is commanded open when:
- Engine bleed is available- Switch in AUTO- No fire or no duct leak.
What happens if an engine bleed duct overpressure, leak of fail condition is detected ?
The eng bleed is automatically shut down.
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
The XBV is commanded open when:
- No bleed source on the opposite side- X bleed starts (flight/ground)- No duct leak
Is the AUTO switching of bleed sources and crossbleed automatic for duct leaks ?
Yes.
What happens if the Xbleed valve fails open ?
EBV1 will be commanded closed if engine bleed 2 is available.
The ODS provide detection of … and … . Normally the sensors are in a … loop configuration.
leaks and overheatdual loop.
The engine is used, in auto configuration, as priority bleed source if:
ECS is selected on
The APU is used, in auto configuration, as priority bleed source, on the ground, if:
- SETI- ECS is OFF and AI/I is OFF
Is it possible to have both the APU and the engines as bleed sources simultaneously ?
No.
In case of an ECS OFF T/O, at what point are the engine bleeds enabled again ?
At 500 ft.
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 ?
No
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 MAXUnless 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 fpmFMS: 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.
