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97 Cards in this Set
- Front
- Back
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How many air management systems (AMS) controllers are installed
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2
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What does pushing in the RECIRC button do
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-Automatic operation by the AMS
-Both recirc fans turn on according to systems logic |
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What does pushing out the RECIRC button do
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Turns off both recirc fans
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What does pushing in the PACK 1/2 button do
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-Automatic operation by the AMS
-Pack 1 or 2 flow control valve opens according to systems logic |
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What does pushing out the PACK 1/2 button do
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Manually closes pack 1 or 2 flow control valve
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What does pushing in the XBLEED button do
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-Automatic operation by the AMS
-Allows x bleed valve to open according to systems logic |
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What does pushing out the XBLEED button do
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Manually closes the x bleed valve
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What does pushing in the the BLEED 1(or 2) button do
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-Automatic operation by the AMS
-Allows the engine bleed valve to open according to systems logic |
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What does pushing out the BLEED 1 (or 2) button do
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Manually closes the engine bleed valve
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What does pushing in the APU BLEED button do
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-Automatic operation by the AMS
-Allows the APU bleed valve to open according to systems logic |
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What does pushing out the APU BLEED valve button do
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Closes the APU bleed valve
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What does the ATTD position do on the PAX CABIN knob
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Switches over the cabin temperature control to the FA control panel
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What side of the XBLEED does the GND CONN air connect
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Right side
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What side of the XBLEED does the APU BLEED air connect
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Left side
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What would be an indication of a detected engine bleed leak
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Amber light illuminates on the top half of the bleed 1/2 button
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Which type of switch is the DUMP button
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Guarded momentary push button
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What happens when the DUMP button is pushed momentarily
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-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 |
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Will the DUMP button work when the pressurization switch is in the manual or landing field control modes
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No, only in automatic mode
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What is the normal position for the CABIN ALT knob
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Stop
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Under what condition will the DOWN or UP positions of the CABIN ALT knob function
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Only with the pressurization mode selector knob set to the MAN position
Provides control over the outflow valve |
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What does the LFE CTRL position of the MODE knob do
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Allows for manual input of landing field elevation in 100 ft increments
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Where is the cabin pressure displayed
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EICAS
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What does the AMBER pressurization display mean
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Amber- Cautionary operation range
Green-Normal operation range Red-Warning operating range |
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What are the four pressurization indications viewed on the EICAS
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ALT
RATE DIFF PRESS LFE |
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The LFE display on the EICAS displays LFE in 2 colors. What are they and what do they mean
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Green-Inputs from FMS
CYAN-Manual Input |
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Where would you find a depiction of the environmental control systems operation and parameters
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MFD Synoptic page
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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 |
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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 |
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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 |
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What colors are used for set and actual temperatures in the cockpit and cabin
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Green-actual temperatire
Cyan-Set temperature |
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What does the OFV stand for on the MFC
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Outflow valve
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Is the manifold pressure displayed on the MFD
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Yes
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When will the ground cart connection be displayed on the MFD
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When it is connected to the aircraft
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What is the normal engine bleed pressure
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45 psig
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How many bleed regulating valves are in each engine
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2-6th and 10th stage
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What prevents the engine bleed from back flowing to the APU when both are running
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APU Bleed Check Valve
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What does the Overheat Detection System (ODS)look at
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Engine bleed
A/C Ducts APU Bleed air distribution Antice supply ducting |
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How many loops does the Overheat Detection System (ODS)have
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2 loops within Six sensor locations
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In addition to air conditioning what other functions does the ECS provide
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-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 |
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How many recirc fans recirculate air back into the cabin and flight deck
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2
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How much of the total air flow entering back into the flight deck and cabin is recirculated
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52% Fresh air
48% Recirculated |
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What causes the recirc fans to turn off
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Dump button pressed or smoke detected in the recirculation bay
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What is the normal position of the gasper shutoff valve
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Closed-It will open when the gasper air supply exceeds 95 F which prevents hot air from blowing on the PX during cabin heating
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How many ventilation fans are in each of the electronic bays
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FWD=3 1&3 are main 2 backup
CENT=3 1&3 main 2 backup AFT=0 |
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Which Secondary Power Distributiuon Assembly units (SPDA) are located in which e-bays
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FWD=SPDA 1
CENT=SPDA 2 AFT=None |
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The aft e-bay has no fan but is cooled how
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Air flowing from the PX cabin
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Which, if any of the cargo bays have ventilation
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FWD-Ventilation for live animals
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What occurs within the FWD cargo bay in the event of smoke detection
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Ventilation fans turn off
Cargo outflow valve closes |
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When is the EMERGENCY RAM AIR VENTILATION commanded open
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Both packs are commanded off or fail and altitude is less than 25,000
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What controls the RAM AIR check valve
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Left side is electrically controlled
The right side for pack 2 is not electric and opens based on pressure differential |
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The pressurization system uses a CABIN PRESSURE CONTROLLER (CPC), How many channels does it have
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2 fully independent channels that alternate after each flight.
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When will the negative pressure relief valve open
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-.5 psi
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When will the positive pressure relief valve open
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8.77 PSI
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Where does the CABIN PRESSURE CONTROLLER (CPC) get its primary information so it can schedule pressurization rates properly
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It reads the cruise flt level, A/C gross weight, and LFE from the FMS before t/off
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What will the CABIN PRESSURE CONTROLLER (CPC) do if no information is provided to it
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It will calculate a backup schedule based on OAT
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What are the normal differential pressures used
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Below 37,000=7.8 psi
Above 37,000=8.34 psi |
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When more than one bleed source is available in flight what is the priority used by the Air Management System
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Onside engine
Opposite engine APU, if activated |
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Does the Air Management System priority change on the ground
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Yes, the APU becomes #1 ?
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Can the APU bleed be used for Anti Ice system in flight
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No
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Under normal conditions when will the APU bleed valve open
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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 |
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Under normal conditions when will the cross bleed valve open
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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 |
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What causes a PACK to close automatically
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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 |
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Do the packs turn on automatically after T/off if they were commanded off during the T/off roll
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Yes
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How many smoke detectors are mounted in the recirculation bay
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One
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What six flight modes are target cabin pressure and pressure rates calculated for
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GROUND
T/OFF CLIMB CRUISE DESCENT ABORT |
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What target cabin pressure is used on the ground
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Set to 0.01 PSI lower than the sensed cabin pressure
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When does the outflow valve close
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On the T/off run-Gear extended and engine at T/off thrust
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What are the two climb modes
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Climb internal mode
Climb external mode |
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What happens during the ABORT mode and when does the airplane enter the abort
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Cabin pressure is scheduled back to the T/off altitude. The airplane stops climbing and begins a descent back to the T/off field
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The pressurization controller uses a CABIN PRESSURE CONTROLLER (CPC). How many channels does it have.
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-Two and they are alternated every flight
-They work independently, but if one fails the other will take over |
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When will the negative pressure relief valve open
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-.5 PSI
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When will the positive pressure releif valve open
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8.7 psi
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Where does the CPC get its primary information so it can schedule pressurization rates properly
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It gets the following information from the FMS before takeoff:
-Cruise flight level -Landing field elevation -Gross weight |
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What would happen if no information was given to the cabin pressurization controller (CPC)
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It would regualte in the backup mode using temperatures
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Can a single engine bleed source provide adequate bleed to operate both packs
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Yes, using crossbleed
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The dump button only works in what mode
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AUTO mode
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When the MODE controller is in LFE CTRL what does the pressurization system think
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It is still in auto mode
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The left pack provides air to
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Flight deck
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The right pack provides air to
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PX cabin
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How is the aft E Bay cooled
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Air from the PX cabin
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How is the FWD E Bay cooled
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3 fans
Fan 1 & 3 are primary 2 is a backup |
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How is the CNT E Bay cooled
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3 fans
Fan 1 & 3 are primary 2 is a backup |
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How many channels does the air management system have (AMS)
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2 Independent, but if failed one can do both sides
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How many recirc fans are there
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2-1 per side
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How is the outflow valve controlled
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Electric
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What is the minimum PSI required for a cross bleed start
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33 psi
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What is the temperature range of the temp controller
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19-35 C
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When will the recirc fans turn off
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Packs off
Smoke in recirc bay Dump button pressed |
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When would you get an EICAS message that the fwd E Bay fans have failed
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On grnd with two primary fans failed, backup failed, or the flow sensor failed
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When would you get an EICAS message that the fans have failed in the center E Bay
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Only, if two fans fail in flight and you have landed
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What area of the aircraft is pressurized
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Radome to beginning of tail
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What does it mean when an M appears next to LFE in the pressurization section on the EICAS
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Manual mode is being used
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How does the AMS know there is an overheat
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Dual overheat sensor loops
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When will the outflow valve automatically close
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Cabin altitude 14500
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When will the cabin alt high come on
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9700 ft
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When manual mode is selected on the PRESSURIZATION panel how does the AMS opearate with regards to its two channels
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Both channels are in standby, but only one channel performs the operation
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When would the gasper valve open
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Only if gasper air temperature exceed 35 degrees C (95F)
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