Embraer 190 - Air Management System

What does "AMS" means?

The APU supplies bleed air ...

• On the ground only.

• Inflight only

• On the ground or inflight.

While the airplane is on the ground and with an engine and APU bleed available simultaneously, the AMS gives priority to APU supply bleed when all of the following conditions are met:

• The opposite engine bleed pressure is below the minimum for engine start ,ground speed is below 50 kt, the cross bleed valve is operating normally and wing anti-ice is not requested.

• The opposite engine bleed pressure is above the minimum for engine start ,ground speed is below 100 kt, the cross bleed valve is operating normally and wing anti-ice is required.

The right engine will be started with the ...

• APU bleed air only.

• Bleed source that is available at engine start (APU or left engine).

The AMS controller sets the bleed airflow to each pack independently, through the respective pack _______ ________ _______ (FCV).

This function is used in the event of emergency evacuation, smoke evacuation or for fast cabin depressurization.

• True

• False

Normally the overheat sensors use (a) ______ loop sensing. In this configuration an overheat is indicated only when (b) _______ detect an overheat condition.

• (a) sinlge / (b) the only loop

• (a) dual / (b) both loops

If either the FMS cruise flight level is set higher than 37000 ft or the airplane is actually flying above 37000 ft the nominal differential pressure switches to ____ psi.

• 7.8

• 8.4

The Engine Bleed Valve is commanded open when the following conditions occur simultaneously:

• Respective bleed switch is set to AUTO , no fire is detected in the respective engine and no bleed duct leak is detected.

• Respective bleed switch is set to AUTO , respective engine bleed is available, no fire is detected in the respective engine and no bleed duct leak is detected.

The _____ can also provide cargo bay ventilation. The cargo bay ventilation system is optional.

• ECS

• AMS

During normal operation, pack 1 adjusts the airflow and flight deck temperature according to the CKPT temperature selector knob position. Pack 2 adjusts the airflow to control passenger cabin temperature according to PAX CABIN selector knob position. 

• True

• False

Emergency ram air ventilation is provided in case of ...

• Pack shutdown only.

• Pack shutdown or for smoke removal.

The engine bleed system alternately selects _____________________________ in order to maintain adequate and safe bleed supply pressure at any engine-operating condition.

• High pressure blee source

• Low pressure bleed source

• Between low pressure and high pressure engine bleed sources

The APU bleed _________ be used for the anti-ice system operation.

• Cannot

• Can

During smoke removal, both ECS cooling packs will be commanded OFF and therefore, the flight deck emergency ram air ventilation valve will be commanded ______ .

• OPEN

• CLOSE

Pushing out the DUMP button commands the system back to normal operation opening the _____ packs and turning on the recirculation fan.

• ECS

• AMS

Bleed air is provided to the Air Management System by the engines, or the APU. The bleed air is used for:

• Environmental Control System (ECS), engine start, engine and wing anti-ice.

• Environmental Control System (ECS), engine and wing anti-ice and water pressurization.

• Environmental Control System (ECS), engine start, engine and wing anti-ice and water pressurization.

The AMS gives priority to the Engine supply bleeds when the following conditions are simultaneously met, with the engine and APU bleed available simultaneously:

• Engine bleed is available.

• The XBLEED valve is operating normally.

• ENG REF ECS is selected ON.

• All of above.

The ____________ ____________ ___________ provides pressurized and conditioned air for the flight deck and passenger cabin, filtered cabin air recirculation, conditioned air supply for gaspers, fan air cooling for avionics and emergency ram air ventilation for flight deck smoke clearance.

• Air Management System (AMS)

• Environmental Control System (ECS)

During normal system operation the gasper shutoff valve remains closed. It automatically opens whenever the gasper air supply exceeds ____ ºC. This prevents hot air from blowing on the passengers during cabin heating.

• 35°C

• 45°C

• 55°C

An emergency ram air ventilation check valve is provided and does not require electronic control. The emergency ram air check valve will be open whenever the pressure in the ram air circuit is ______ than cabin pressure.

• Greater

• Lower

The negative pressure relief valve is a spring loaded check valve that works without any electrical power, and is independent of the CPCS. Its function is to protect the airplane structure against damages due to a negative differential pressure. The negative pressure relief valve opens if differential pressure between cabin and surrounding environment exceeds ________ .

• -0.5 psi

• -1.5 psi

• -2.5 psi

The static pressure port senses the environmental static pressure and mechanically transmits it to the ______ ______ ______ ______ in order to allow the overpressure relief device to work. The static port is electrically heated to assure there are no obstructions of sensing orifices due to ice accumulation. 

• Positive pressure relief valve

• Negative pressure relief valve

During airborne engine start without Anti-Ice the left engine will be started with the opposite engine if the ________________ is greater than the minimum required for engine start.

• APU bleed pressure

• Right bleed pressure

The ECS provides ventilation for live animals in the forward cargo bay. This optional system contains a fan on the side of the bay which provides underfloor recirculation air into the bay. The system also contains a _______ at the outlet of the bay that closes in the event of fire and thus preventing halon from leaving the bay. In addition, in the event of fire, the forward cargo compartment fan is commanded OFF to prevent halon from entering the cabin.

• Shutoff valve

• Check valve

The positive pressure relief valve is a spring loaded check valve that works without any electrical power, and is independent the CPCS. Its function is to protect the airplane’s structure against damage due to positive overpressure. In case of outflow valve failure, the positive pressure relief valve opens if the pressure differential between cabin and surrounding environment exceeds _______ .

• 7.6 psi.

• 8.6 psi.

• 9.6 psi.

If the FMS cruise flight level is set below 37000 ft the nominal differential pressure of ____ psi is used. 

• 7.8

• 8.4

The _____ controller automaticaly selects the bleed source on ground and during flight between the engines, the APU and the external connections.

• AMS (Air Management System)

• ECS (Environmental Control System)

 The CPC has two fully independent automatic channels, which are alternated following each flight. Both channels provide a manual function as backup, enabling the crew to control cabin pressure by directly actuating the _______ ________(OFV) position.

If the cabin altitude is above 12400 ft when the dump is activated, the cabin altitude may be rising due to a normal leak. To achieve a higher rate of climb ...

• The manual mode can be used.

• The manual mode must not be used.

___ fan is installed in this compartment. Air flowing from passenger cabin provides cooling of the aft e-bay and is expelled towards the underflow recirculation bay.

• No

• One

With the pressurization system in manual mode the pilot is responsible to open or close the OUT FLOW VALVE to maintain the desired cabin altitude. NOTE: In manual mode there is no automatic cabin depressurization on the ground (after landing). The Dump Function is not available in ____________ .

• Manual Mode

• Automatic Mode

The Engine Bleed #1 will be commanded closed if ...

• The cross bleed fails OPEN and the other bleed source is the #2 engine.

• The cross bleed fails CLOSE and the other bleed source is the #2 engine.

During engine start with Anti-ice, the AMS controller will prioritize cross bleed start.

• True

• False

The flight deck pack emergency ram air ventilation valve is commanded OPEN only if both ECS cooling packs are commanded OFF or failed OFF and the plane’s altitude is less than _______ .

• 25000

• 15000

The CPCS uses the (1) _____________ , the (2) ____________ set by the pilot and the (3) ____________retrieved from the FMS data base to schedule the target cabin altitude and the cabin pressure variation rate.

• (1) gross weight / (2) cruise altitude / (3) takeoff field elevation

• (1) gross weight / (2) cruise altitude / (3) landing field elevation

• (1) ZFW weight / (2) cruise altitude / (3) landing field elevation

Each engine normally supplies bleed air to the respective pack. A single pack is capable of keeping adequate cabin/cargo hold pressurization and temperature. Single engine bleed can supply both ECS packs using the ________ ________ .

The forward e-bay ventilation consists of _____ fans, which provide forced cooling air for # 1 Secondary Power Distribution Assembly (SPDA 1), Emergency Integrated Control Center (EICC) and all other avionics located in this e-bay. The fans draw air from the cockpit and expel air toward the underfloor recirculation bay. A flow sensor is used for fan/flow health monitoring.

• Two

• Three

The center e-bay ventilation consists of _____ fans, which provide forced cooling air for the center e-bay electronics, Left Integrated Control Center (LICC), Right Integrated Control Center (RICC) and SPDA 2. The fans draw air from the rear cabin return and expel it towards the underfloor recirculation bay. Flow sensors are used for fans/flow health monitoring.

• Two

• Three

The trim air system controls the amount of hot bleed air provided from _____ into the mixer for independent control of forward and aft cabin zone temperatures.

• Pack 1

• Pack 2

The ________ automatic mode splits a typical flight into different CPCS flight modes. Information from engine N2, landing gear status, FADEC, ADC and FMS are used within the cabin pressure controller to determine the current flight mode.

• ECS

• CPCS

The manual mode is activated rotating the pressurization mode selector knob to the MAN position. When manual mode is selected, both channels of the CPCS controller revert to standby state, but only one channel performs the manual operation. The channel selection is ____________ .

• Manual

• Automatic

The packs are recovered if any of the following conditions occur: 

• Thrust lever reduction below TO/GA;

• The airplane is taking off with two engines operating 500 ft above takeoff field altitude.

• The airplane is above 9700 ft, for takeoff fields at 8000 ft or below and one engine inoperative;

• The airplane is above 15000 ft, for takeoff fields above 8000 ft and one engine inoperative.

• The airplane is above 9700 ft during go around, in case one engine is inoperative.

• All of above

The system will automatically shut down the affected bleed system by closing the engine bleed valves when ....

• A leak, switch not in AUTO or fail condition is identified.

• A leak, overpressure or fail condition is identified.

• A leak, overpressure or no pressure available

What does "ECS" means?

The FADEC may send an ECS OFF signal to the AMS controller, requesting that no bleed is extracted from the engine for the air-conditioning system. The FADEC sets this signal depending on the T/O DATASET input (REF ECS OFF), pressure altitude, flight phase, and engine inoperative detection. The AMS controller disregards the ECS OFF signal when the airplane is above _________ .

• 5000 ft.

• 15000 ft.

• 25000 ft.

The ECS OFF signal CLOSES the packs during takeoff if any of the following conditions occur:

• One engine inoperative and APU bleed is not available;

• Thrust levers set to MAX position and APU bleed is not available;

• T/O DATASET REF ECS set to OFF on the MCDU and APU bleed is not available;

• T/O DATASET REF ECS set to OFF and T/O DATASET REF A/I set to ALL on the MCDU.

• All of above.

The ECS OFF signal CLOSES both packs during go-around if any of the following conditions occur:

• One engine inoperative and APU bleed is not available up to 9700 ft;

• Thrust levers set to MAX position and APU bleed is not available;

• Thrust levers set to MAX position and Wing Ice Protection System is requested ON.

• Thrust levers set to MAX position and APU bleed is available;