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97 Cards in this Set

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  • Back
How many air management systems (AMS) controllers are installed
2
What does pushing in the RECIRC button do
-Automatic operation by the AMS
-Both recirc fans turn on according to systems logic
What does pushing out the RECIRC button do
Turns off both recirc fans
What does pushing in the PACK 1/2 button do
-Automatic operation by the AMS
-Pack 1 or 2 flow control valve opens according to systems logic
What does pushing out the PACK 1/2 button do
Manually closes pack 1 or 2 flow control valve
What does pushing in the XBLEED button do
-Automatic operation by the AMS
-Allows x bleed valve to open according to systems logic
What does pushing out the XBLEED button do
Manually closes the x bleed valve
What does pushing in the the BLEED 1(or 2) button do
-Automatic operation by the AMS
-Allows the engine bleed valve to open according to systems logic
What does pushing out the BLEED 1 (or 2) button do
Manually closes the engine bleed valve
What does pushing in the APU BLEED button do
-Automatic operation by the AMS
-Allows the APU bleed valve to open according to systems logic
What does pushing out the APU BLEED valve button do
Closes the APU bleed valve
What does the ATTD position do on the PAX CABIN knob
Switches over the cabin temperature control to the FA control panel
What side of the XBLEED does the GND CONN air connect
Right side
What side of the XBLEED does the APU BLEED air connect
Left side
What would be an indication of a detected engine bleed leak
Amber light illuminates on the top half of the bleed 1/2 button
Which type of switch is the DUMP button
Guarded momentary push button
What happens when the DUMP button is pushed momentarily
-White striped bar illuminates and the cabin pressure decreases at a rate of 2000/ft min until it reaches 12400 ft.

-It works only when in auto mode

-It will cause both packs and the recirculation fan to deactivate
Will the DUMP button work when the pressurization switch is in the manual or landing field control modes
No, only in automatic mode
What is the normal position for the CABIN ALT knob
Stop
Under what condition will the DOWN or UP positions of the CABIN ALT knob function
Only with the pressurization mode selector knob set to the MAN position

Provides control over the outflow valve
What does the LFE CTRL position of the MODE knob do
Allows for manual input of landing field elevation in 100 ft increments
Where is the cabin pressure displayed
EICAS
What does the AMBER pressurization display mean
Amber- Cautionary operation range

Green-Normal operation range

Red-Warning operating range
What are the four pressurization indications viewed on the EICAS
ALT
RATE
DIFF PRESS
LFE
The LFE display on the EICAS displays LFE in 2 colors. What are they and what do they mean
Green-Inputs from FMS
CYAN-Manual Input
Where would you find a depiction of the environmental control systems operation and parameters
MFD Synoptic page
What are the MFD indications for the following air shut off valve conditions:
1.OPEN
2.CLOSED
3.ON TRANSIT
4.FAILED CLOSED
5.FAILED OPEN
6.UNKNOWN
1.Green circle & green line aligned w/flow line
2.White circle & white line perpendicular to the flow line
3.White circle & white line in diagnol to the flow line
4.White circle & white line perpendicular to the flow line covered by an amber cross
5.Green circle & green line aligned w/flow line covered by an amber cross
6.Amber dashed circle w/no line
What are the MFD indications for the following PACK STATUS conditions:
1.ON
2.OFF
3.FAILED
4.UNKNOWN
1.Green rectangle
2.White rectangle
3.Amber dashed rectangle covered by an amber cross
4.Amber dashed rectangle
What are the MFD indications for the following RECIRC FAN STATUS conditions:
1.ON
2.OFF
3.FAILED
4.UNKNOWN
1.Gray circle w/green windmill
2.Gray circle w/gray windmill
3.Gray circle w/white windmill beneath an amber cross
4.Amber dashed circle & an amber windmill
What colors are used for set and actual temperatures in the cockpit and cabin
Green-actual temperatire
Cyan-Set temperature
What does the OFV stand for on the MFC
Outflow valve
Is the manifold pressure displayed on the MFD
Yes
When will the ground cart connection be displayed on the MFD
When it is connected to the aircraft
What is the normal engine bleed pressure
45 psig
How many bleed regulating valves are in each engine
2-6th and 10th stage
What prevents the engine bleed from back flowing to the APU when both are running
APU Bleed Check Valve
What does the Overheat Detection System (ODS)look at
Engine bleed
A/C Ducts
APU Bleed air distribution
Antice supply ducting
How many loops does the Overheat Detection System (ODS)have
2 loops within Six sensor locations
In addition to air conditioning what other functions does the ECS provide
-Filtered cabin air recirculation
-Conditioned air for gaspers
-Fan air cooling for avionics
-Emergency ram air ventilation for flt deck smoke clearance
-Optional cargo bay ventilation
How many recirc fans recirculate air back into the cabin and flight deck
2
How much of the total air flow entering back into the flight deck and cabin is recirculated
52% Fresh air
48% Recirculated
What causes the recirc fans to turn off
Dump button pressed or smoke detected in the recirculation bay
What is the normal position of the gasper shutoff valve
Closed-It will open when the gasper air supply exceeds 95 F which prevents hot air from blowing on the PX during cabin heating
How many ventilation fans are in each of the electronic bays
FWD=3 1&3 are main 2 backup
CENT=3 1&3 main 2 backup
AFT=0
Which Secondary Power Distributiuon Assembly units (SPDA) are located in which e-bays
FWD=SPDA 1
CENT=SPDA 2
AFT=None
The aft e-bay has no fan but is cooled how
Air flowing from the PX cabin
Which, if any of the cargo bays have ventilation
FWD-Ventilation for live animals
What occurs within the FWD cargo bay in the event of smoke detection
Ventilation fans turn off
Cargo outflow valve closes
When is the EMERGENCY RAM AIR VENTILATION commanded open
Both packs are commanded off or fail and altitude is less than 25,000
What controls the RAM AIR check valve
Left side is electrically controlled

The right side for pack 2 is not electric and opens based on pressure differential
The pressurization system uses a CABIN PRESSURE CONTROLLER (CPC), How many channels does it have
2 fully independent channels that alternate after each flight.
When will the negative pressure relief valve open
-.5 psi
When will the positive pressure relief valve open
8.77 PSI
Where does the CABIN PRESSURE CONTROLLER (CPC) get its primary information so it can schedule pressurization rates properly
It reads the cruise flt level, A/C gross weight, and LFE from the FMS before t/off
What will the CABIN PRESSURE CONTROLLER (CPC) do if no information is provided to it
It will calculate a backup schedule based on OAT
What are the normal differential pressures used
Below 37,000=7.8 psi
Above 37,000=8.34 psi
When more than one bleed source is available in flight what is the priority used by the Air Management System
Onside engine
Opposite engine
APU, if activated
Does the Air Management System priority change on the ground
Yes, the APU becomes #1 ?
Can the APU bleed be used for Anti Ice system in flight
No
Under normal conditions when will the APU bleed valve open
1.APU switch set to AUTO
2.APU bleed available
3.No APU & left bleed duct leak
4.Left engine bleed unavailable
5.Anti ice system not requested
Under normal conditions when will the cross bleed valve open
X bleed pushed in and:
1.One side provides MP & there is not a bleed source on opp side
2.APU bleed button pushed out for main engine start
3.Engine 2 start in the air
4.APU bleed off for engine #1 start in the air
What causes a PACK to close automatically
1.Bleed air source not available for the pack
2.Respective pack button off
3.Any engine is starting
4.Respective bleed system duct leak
5.Any packs BIT shutdown failures are present (pack 1 or 2) FAIL EICAS message displayed
6.ECS selected OFF on the MCDU & ECS can be commanded OFF according to systems logic
Do the packs turn on automatically after T/off if they were commanded off during the T/off roll
Yes
How many smoke detectors are mounted in the recirculation bay
One
What six flight modes are target cabin pressure and pressure rates calculated for
GROUND
T/OFF
CLIMB
CRUISE
DESCENT
ABORT
What target cabin pressure is used on the ground
Set to 0.01 PSI lower than the sensed cabin pressure
When does the outflow valve close
On the T/off run-Gear extended and engine at T/off thrust
What are the two climb modes
Climb internal mode
Climb external mode
What happens during the ABORT mode and when does the airplane enter the abort
Cabin pressure is scheduled back to the T/off altitude. The airplane stops climbing and begins a descent back to the T/off field
The pressurization controller uses a CABIN PRESSURE CONTROLLER (CPC). How many channels does it have.
-Two and they are alternated every flight

-They work independently, but if one fails the other will take over
When will the negative pressure relief valve open
-.5 PSI
When will the positive pressure releif valve open
8.7 psi
Where does the CPC get its primary information so it can schedule pressurization rates properly
It gets the following information from the FMS before takeoff:
-Cruise flight level
-Landing field elevation
-Gross weight
What would happen if no information was given to the cabin pressurization controller (CPC)
It would regualte in the backup mode using temperatures
Can a single engine bleed source provide adequate bleed to operate both packs
Yes, using crossbleed
The dump button only works in what mode
AUTO mode
When the MODE controller is in LFE CTRL what does the pressurization system think
It is still in auto mode
The left pack provides air to
Flight deck
The right pack provides air to
PX cabin
How is the aft E Bay cooled
Air from the PX cabin
How is the FWD E Bay cooled
3 fans
Fan 1 & 3 are primary
2 is a backup
How is the CNT E Bay cooled
3 fans
Fan 1 & 3 are primary
2 is a backup
How many channels does the air management system have (AMS)
2 Independent, but if failed one can do both sides
How many recirc fans are there
2-1 per side
How is the outflow valve controlled
Electric
What is the minimum PSI required for a cross bleed start
33 psi
What is the temperature range of the temp controller
19-35 C
When will the recirc fans turn off
Packs off
Smoke in recirc bay
Dump button pressed
When would you get an EICAS message that the fwd E Bay fans have failed
On grnd with two primary fans failed, backup failed, or the flow sensor failed
When would you get an EICAS message that the fans have failed in the center E Bay
Only, if two fans fail in flight and you have landed
What area of the aircraft is pressurized
Radome to beginning of tail
What does it mean when an M appears next to LFE in the pressurization section on the EICAS
Manual mode is being used
How does the AMS know there is an overheat
Dual overheat sensor loops
When will the outflow valve automatically close
Cabin altitude 14500
When will the cabin alt high come on
9700 ft
When manual mode is selected on the PRESSURIZATION panel how does the AMS opearate with regards to its two channels
Both channels are in standby, but only one channel performs the operation
When would the gasper valve open
Only if gasper air temperature exceed 35 degrees C (95F)