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]
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]
True or False?
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]
True or False
True.
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]
Engine core and inlet cowl anti-ice.
The forward cargo compartment is heated by: [8.20.20]
- Forward E/E cooling exhaust air.
- Inline electric heater in the cargo compartment.
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.
- EQUIP COOLING FWD EICAS advisory message.
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]
A. Reset a failed recirculation fan.
B. Reset a failed trim air valve.
C. Reset a pack fault
D. All the above.
An EICAS message of PACK MODE (L or R) indicates _______. [8.20.20]
- The pack is operating in the Standby Cooling mode.
- 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]
True or False?
True.
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]
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]
True or False?
True.
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]
The Trim Air system
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]
- Causes the EICAS pressurization systems indications to display.
- 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]
- FWD CARGO TEMPswitch selected off.
- 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]
True or False?
True.
The use of both packs provides more efficient operation and is recommended for normal ground operations. [8.20.20]
True or False?
True.
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]
True or False?
True.
The FWD and BULK CARGO TEMP switches when set to AUTO, maintain a temperature of approximately F. [8.20.30]
70°
