AIR Flashcards
What temperature is commanded when the cabin air temp controller is at the 12 o’clock position?
75 degrees
The circulation fans draw air from the cabin, through filters, then reintroduce it into the cabin distribution ducts.
True
Recirculation fans must remain on during hot weather operations unless a non-normal checklist directs otherwise.
True.
What does the “PACK MODE” EICAS message mean?
A pack component has failed and the pack has reverted to standby cooling.
What are the uses of engine bleed air?
B. Engine anti-ice.
C. Engine core heat.
The forward cargo compartment is heated by _________.
A. Forward equipment ventilation system discharge air.
C. Inline electric heaters for the cargo compartment.
Which of the following is true concerning pack operation in the standby cooling mode?
A. For certain internal malfunctions a pack automatically enters the standby cooling mode.
B. In Standby Cooling the pack shuts down at lower altitudes and higher outside air temperature when ambient conditions do not permit standby cooling.
C. Decreased pack cooling capacity may result in warm flight deck or cabin temperatures at lower altitude.
the source of heat for the Bulk cargo compartment is:
Aft equipment cooling system discharge air in conjunction with an inline electric heater.
What are the indications of a loss of forward equipment cooling on the ground?
A. A horn sounds in the nose wheel.
B. EQUIP COOLING FORWARD EICAS message.
Where does the pressurization system normally get flight operating parameters?
A. From ambient pressure.
B. From the FMC flight plan data.
If the EICAS message PACK (L, R) is displayed, an attempt to restore pack operation may be made by pressing the AIR COND RESET switch
A. True
The two outflow valves are identical and either valve is capable of full airflow and pressurization control. If either valve fails full open, loss of pressurization willoccur.
A. True
In flight, the APU is available as an alternate bleed source.
B. False
When a pack overheat is detected:
The pack automatically shuts down.
With loss of inputs from the flight deck or cabin temperature controls, the pack(s) will:
Maintain a cabin temperature of 75 degrees F.
The forward equipment cooling system provides ventilation to:
the E/E bay and electronic equipment on the flight deck.
Landing altitude barometic pressure correction comes from:
the Captains altimeter setting.
Pushing the AIR COND RESET switch will:
A. Attempt to reset failed recirculation fan.
B. Attempt to reset a failed (tripped) pack.
What determines the pack outlet temperature?
The zone requesting the coldest temperature.
When does the bulk cargo fan operate?
When AUTO is selected on the bulk cargo temp switch.
Pulling the Landing Altitude (LDG ALT) selector:
A. Displays pressurization systems indications on the EICAS display.
C. Overrides the FMC altitude inputs to the cabin altitude controllers.
What has occured when the FWD CARGO TEMP “OFF” light is illuminated amber?
A. FWD E/E cooling is in override.
B. A fire has been detected in the FWD CARGO compartment.
C. The FWD E/E exhaust fan is inoperative.
When is APU bleed air supply primarily used?
There is no APU bleed air capability on the 787.
How does the automatic pressurization system keep “pressure bumps” from occuring during takeoff?
A. for takeoff, the system supplies a small positive pressure for smooth cabin altiude transitions.
The use of only one A/C pack is recommended for normal ground
B. False
Outside airflow to the cabin during normal operations may be reduced by
the flight attendents based on the number of occupants in the cabin.
Do the flight deck and passenger cabin temperature selectors on the air conditioning panel have a manual temperature control position?
No, neither one can be controlled manually.
the lavatory/galley ventilation system provides smoke control for the lavs and crew rest compartments and ventilization air for the lav/gallery areas.
A. True
With the FWD and BULK CARGO TEMP switches set to AUTO, the compartment temperature is maintained to approximately ____ F.
B. 70
The forward cargo compartment is heated by:
Forward equipment ventilation system.
The aircraft pressurization system is operated in the manual mode by:
A. Setting the OUTFLOW VALVE switches to MAN.
C. Selecting the related OUTFLOW VALVE MANUAL switches to OPEN or CLOSE as required.
When using the Landing Altitude selector, the manual landing field selection limits are:
2,000 feet below sea level to 14,000 feet above sea level
When is the pack OFF light illuminated amber?
A. During engine start
B. When there is a pack or compressor outlet high temperature condition.
C. When manually selected to OFF
How does the trim air system meet zone temperature requirements?
It heats conditioned air
The alternate ventilation system ____.
provides an alternate means of ventilating the cabin in the event both packs are inoperative.
How can passenger cabin humidity cabin humidity be controlled in flight?
System is automatic and has no manual controls.
Cabin Air Compressor (CAC) operations maybe limited during electrical load shed operations.
A. True
During engine starts, both packs shutdown and do not restart until:
2 minutes after the start is initiated and engine(s) is running.
During engine starts, both packs shutdown and do not restart until:
2 minutes after the start is initiated and engine(s) is running.
During cruise flight, the maximum cabin ltitude during normal operations is ____.
6000 ft
If the cruise altitude from the FMC (while in AUTO pressurization) is unavailable, the default cruise altitude will be ___.
43,000 ft
When checking the PECS coolant level during preflight, the expected normal service level is ____.
1.0
Flight deck humidity operates when the HUMID switch is ON and:
in cruise flight and is automatically switched OFF approximately 1 - 1.5 hours prior to touchdown.
The CAC deflector doors may retract when the ambient air temperature is below 35 degrees F or above 95 degrees F.
A. True
Airflow from the CAC’s to the packs may be regulated from the flight deck.
B. False
Additional cabin cooling and reduced power required by the CAC’s is provided by the:
Lower recirculation system.
Turning the recirculation fans OFF does not increase the amount of fresh air to the cabin, but actually decreases air flow.
A. True
