Air Systems Flashcards
The Flight Deck Temperature selector sets a target flight deck temperature. When selected to the 12 o’clock position, what temperature is commanded? [8.20.30]
The Flight Deck Temperature selector sets a target flight deck temperature. When selected to the 12 o’clock position, what temperature is commanded? [8.20.30]
* 75 degrees.
The recirculation fans draw air from the cabin, through filters, then reintroduce it into the cabin distribution ducts. Turning OFF a fan will result in increased cabin air flow.
[8.20.20]
The recirculation fans draw air from the cabin, through filters, then reintroduce it into the cabin distribution ducts. Turning OFF a fan will result in increased cabin air flow.
[8.20.20]
* False.
The flight deck receives 100% fresh conditioned outside air and the passenger cabin receives a mix of outside air and recirculated air. [8.20.20]
The flight deck receives 100% fresh conditioned outside air and the passenger cabin receives a mix of outside air and recirculated air. [8.20.20]
* True.
What does the “PACK L” EICAS message mean? [8.20.20]
What does the “PACK L” EICAS message mean? [8.20.20]
* The left pack is inoperative.
What are the uses of engine bleed air? [8.20.10]
What are the uses of engine bleed air? [8.20.10]
* Engine core and inlet cowl anti-ice.
The forward cargo compartment is heated by: [8.20.20]
The forward cargo compartment is heated by: [8.20.20]
* Forward E/E cooling exhaust air.
–AND–
* Inline electric heater in the cargo compartment.
A loss of forward equipment cooling on the ground results in: [8.20.20]
A loss of forward equipment cooling on the ground results in: [8.20.20]
* A ground crew call horn sounding in the nose wheel well.
–AND–
* EQUIP COOLING FWD EICAS advisory message
The pressurization system normally receives flight parameters: [8.20.40]
The pressurization system normally receives flight parameters: [8.20.40]
* From ambient pressure and the FMC flight plan data.
Pressing the AIR COND RESET switch on the overhead panel (per non-normal) will: [8.20.30]
Pressing the AIR COND RESET switch on the overhead panel (per non-normal) will: [8.20.30]
All of the below:
A. Reset a failed recirculation fan.
B. Reset a failed trim air valve.
C. Reset a pack fault
An EICAS message of PACK MODE (L or R) indicates _______. [8.20.20]
An EICAS message of PACK MODE (L or R) indicates _______. [8.20.20]
* The pack is operating in the Standby Cooling mode
–AND–
* The pack may shut down at lower altitudes and higher outside air temperatures when ambient conditions do not permit standby cooling.
Cabin altitude and full ventilation rates can be maintained by either outflow valve. [8.20.40]
Cabin altitude and full ventilation rates can be maintained by either outflow valve. [8.20.40]
* True.
With a PACK L or PACK R message displayed on EICAS due to an overheat: [8.20.20]
With a PACK L or PACK R message displayed on EICAS due to an overheat: [8.20.20]
* The pack automatically shuts down.
If the cabin temperature controller fails, the pack(s) will: [8.20.20]
If the cabin temperature controller fails, the pack(s) will: [8.20.20]
* Maintain the last cabin temperature or 75 F
Forward equipment cooling system provides ventilation to the FWD E/E bay and electronic equipment on the flight deck. [8.20.20]
Forward equipment cooling system provides ventilation to the FWD E/E bay and electronic equipment on the flight deck. [8.20.20]
* True.
The pressurization system uses to provide landing altitude barometric pressure correction. [8.20.40]
The pressurization system uses to provide landing altitude barometric pressure correction. [8.20.40]
* The Captains altimeter setting
Pack outlet temperature is set by the zone requesting the coldest temperature. All other zones are then warmed by: [8.20.20]
Pack outlet temperature is set by the zone requesting the coldest temperature. All other zones are then warmed by: [8.20.20]
* The Trim Air system
The bulk ventilation fan operates: [8.20.20]
The bulk ventilation fan operates: [8.20.20]
* When AUTO is selected on the BULK CARGO TEMP switch.
Pulling the Landing Altitude (LDG ALT) selector: [8.20.40]
Pulling the Landing Altitude (LDG ALT) selector: [8.20.40]
* Causes the EICAS pressurization systems indications to display.
–AND–
* Overrides the FMC altitude inputs to the cabin altitude controllers.
Which of the following cause the FWD CARGO TEMP switch “OFF” light to illuminate amber? [8.20.30]
Which of the following cause the FWD CARGO TEMP switch “OFF” light to illuminate amber? [8.20.30]
* FWD CARGO TEMP switch selected off
–AND–
* Forward cargo heater overheat.
For takeoff, the automatic pressurization system supplies a small positive pressurization at rotation to provide a smooth transition to the cabin altitude climb schedule. [8.20.40]
For takeoff, the automatic pressurization system supplies a small positive pressurization at rotation to provide a smooth transition to the cabin altitude climb schedule. [8.20.40]
* True.
The use of both packs provides more efficient operation and is recommended for normal ground operations. [8.20.20]
The use of both packs provides more efficient operation and is recommended for normal ground operations. [8.20.20]
* True.
Outside airflow to the cabin during normal operations may be reduced by: [8.20.20]
Outside airflow to the cabin during normal operations may be reduced by: [8.20.20]
* The flight attendant’s entry of the number of occupants on the CABIN OCCUPANTS screen.
The Flight Deck Temperature selector on the air conditioning panel can select a target temperature (e.g., 70°). [8.20.30]
The Flight Deck Temperature selector on the air conditioning panel can select a target temperature (e.g., 70°). [8.20.30]
* True.
The FWD and BULK CARGO TEMP switches when set to AUTO, maintain a temperature of approximately F. [8.20.30]
The FWD and BULK CARGO TEMP switches when set to AUTO, maintain a temperature of approximately F. [8.20.30]
* 70°
The pressurization system may be operated manually by: [8.20.40]
The pressurization system may be operated manually by: [8.20.40]
* Setting the OUTFLOW VALVE switches to MAN and adjusting the outflow valve position using the related OUTFLOW VALVE switch to OPEN or CLOSE.
What are the manual selection limits when using the Landing Altitude selector? [8.20.40]
What are the manual selection limits when using the Landing Altitude selector? [8.20.40]
* 2000 feet below sea level to 14,000 feet above sea level.
When will the pack OFF light illuminate amber? [8.20.30]
When will the pack OFF light illuminate amber? [8.20.30]
Any of the below:
A. During engine start.
B. When there is a pack high temperature condition.
C. When manually selected to OFF.
The alternate ventilation system: [8.20.20]
The alternate ventilation system: [8.20.20]
* Provides a means of ventilating the cabin in the event both packs are inop.
The electrical system, using electronic controllers, can limit CAC operation during load shed operations. [8.20.20]
The electrical system, using electronic controllers, can limit CAC operation during load shed operations. [8.20.20]
* True.
During engine start, both packs shutdown and do not restart until 2 minutes after the start is initiated and the engine is running. [8.20.20]
During engine start, both packs shutdown and do not restart until 2 minutes after the start is initiated and the engine is running. [8.20.20]
* True
During cruise flight, the maximum cabin altitude during normal operations is _______. [8.20.40]
During cruise flight, the maximum cabin altitude during normal operations is _______. [8.20.40]
* 6000 feet
What cruise altitude is assumed if the cruise altitude from the FMC (while in AUTO pressurization) is unavailable? [8.20.40]
What cruise altitude is assumed if the cruise altitude from the FMC (while in AUTO pressurization) is unavailable? [8.20.40]
* 43,000 feet
If PECS coolant level servicing is recommended, what indication(s) do the pilots have of the condition? [8.20.30]
If PECS coolant level servicing is recommended, what indication(s) do the pilots have of the condition? [8.20.30]
* An RF indication by the quantity value on STATUS page
–AND–
* An amber indication for the quantity on the status page.
The flight deck humidifier operates when the HUMID switch is ON and: [8.20.20]
The flight deck humidifier operates when the HUMID switch is ON and: [8.20.20]
* Above 25,000 feet. The system automatically switches OFF approximately 1 - 1.5 hours prior to touchdown.
The CAC deflector doors may retract on the ground when the ambient air temperature is below 35°F or above 95°F. [8.20.20]
The CAC deflector doors may retract on the ground when the ambient air temperature is below 35°F or above 95°F. [8.20.20]
* True.
Cabin airflow may be adjusted by the flight attendants on the ground before pushback using the Cabin Attendants Panel located at door 1L. [8.20.20]
Cabin airflow may be adjusted by the flight attendants on the ground before pushback using the Cabin Attendants Panel located at door 1L. [8.20.20]
* True
The Lower Recirculation System provides additional cabin cooling and helps reduce the power required by the CACs. [8.20.20]
The Lower Recirculation System provides additional cabin cooling and helps reduce the power required by the CACs. [8.20.20]
* True.
To increase cabin fresh air flow the LOWER RECIRC fans may be turned OFF. [8.20.20]
To increase cabin fresh air flow the LOWER RECIRC fans may be turned OFF. [8.20.20]
* False.
A single CAC provides sufficient air to operate the associated pack in all operating modes. [8.20.20]
A single CAC provides sufficient air to operate the associated pack in all operating modes. [8.20.20]
* True.
When the cabin occupant information is entered on the cabin attendant panel, the following occurs: [8.20.20]
When the cabin occupant information is entered on the cabin attendant panel, the following occurs: [8.20.20]
* Adjusts the CAC power consumption, fuel burn, and humidity in the cabin.
________ is the maximum takeoff and landing pressure altitude. [1.20.]
________ is the maximum takeoff and landing pressure altitude. [1.20.]
* 14,000 feet
Pressurization system indications are automatically displayed on the EICAS when: [8.20.50]
Pressurization system indications are automatically displayed on the EICAS when: [8.20.50]
Any of the below:
A. AIR synoptic is displayed on any MFD.
B. Either outflow valve switch is in MAN.
C. EICAS message CABIN ALTITUDE is displayed.
When carrying live animals: [8.20.20]
When carrying live animals: [8.20.20]
* Either the FWD or BULK compartments may be used.
