Systems - Air Conditioning Flashcards
During normal operations, the air conditioning system temperature is regulated by (FM:8.20.30.1)
One zone controller and two PACK controllers.
The pack flow control valve automatically closes for all but which of the following? (FM: 8.20.40.2)
High air pressure.
Under normal conditions, it is possible to control temperature in all areas except the (FM: 8.20.30.5)
Forward cargo compartment.
If the APU is supplying bleed air or one PACK fails, ____ flow is
delivered regardless of pack flow selector position (FM: 8.20.40.1).
HI
f Pack Flow is selected to LO and temperature demand cannot be satisfied, the pack reverts to ____ flow (FM: 8.20.40.1).
NORM
What happens if a zone cooling demand is not met due to low bleed pressure? (FM: 8.20.30.3)
Engine idle is automatically increased.
The PACK valves close when the ENG MODE SEL switch is placed to IGN/START before engine start. When will they reopen? (FM: 8.70.10.4)
Thirty seconds after first engine start if second engine start has not been initiated.
Hot ____ air from the pneumatic system is used to maintain desired
zone temperature (FM: 8.20.30.1).
Trim
Using external conditioned ground air simultaneously with airplane pack air is (FM: 1.30.3)
Prohibited.
The HOT AIR FAULT light illuminates amber when a duct ____ is detected (FM: 6.20.40.1).
Overheat
(48xx/49xx and NEO) The hot air pressure regulating valve closes if (FM: 8.20.30.2)
The duct overheats or at least 2 trim valves fail
(48xx/49xx and NEO) The hot air pressure regulating valve closes if (FM: 8.20.30.2)
Both lanes of the ACSC fails
What happens to cabin zone inlet duct temperature if the lav/galley extract fan fails? (FM: 6.20.30.2)
Cabin zone inlet duct temperature is fixed at 59°F.
If the primary PACK controller channel fails, the secondary pack controller channel automatically takes over and (FM: 8.20.30.3)
Pack flow is fixed at pre-failure setting.
What occurs if both PACK controller channels fail? (FM: 8.20.30.3)
PACK outlet temp goes to a set temperature range by the pack anti-ice valve.
(48xx/49xx and NEO) If a single lane of an ACSC fails (FM 8.20.30.4)
The second lane takes over and has no effect on the system
(48xx/49xx and NEO) If both lanes of an ACSC fails (FM 8.20.30.4)
The associated pack is lost
(48xx/49xx and NEO) Temperature regulation is controlled by ___ Air Conditioning System Controllers (ACSC) (FM 8.20.30.1)
2
(48xx/49xx and NEO) Each ACSC directly regulates the temperature of its associated pack and modulates airflow through the _________ to optimize the temperature regulation (FM 8.20.30.2)
Trim air valves
If a zone controller primary channel fault occurs, what happens to the air conditioning system? (FM: 8.20.30.3)
The flight deck is controlled to 76 degrees F by pack 1 and the cabin forward and aft zones are controlled to 76 degrees F by pack 2.
ALTN MODE displays in green on the ECAM COND page when a
(FM: 8.20.40.6 )
Primary zone controller fault is detected.
If both zone controller channels fail, (FM: 8.20.30.3)
The related ECAM information is not displayed, and message PACK REG appears.
What pilot action is required with loss of primary and secondary zone controller channels? (FM: 8.20.30.3)
None. System automatically goes to a fixed temperature.
Selecting the RAM AIR switch ON, opens the ram air inlet
provided the ____ switch is in its normal position. (FM:8.20.40.1)
DITCHING
When will the avionics ventilation system be in the closed configuration while on the ground? (FM: 8.20.30.4)
Cold skin temperatures.
You are doing the walkaround at ORD in January and notice both the inlet and extract valves are closed. You should (FM: 8.20.30.4)
Continue the walkaround; this is normal.
The avionics ventilation system provides cooling for all the following except the (FM: 6.20.30.4)
Cabin entertainment system.
The Air Conditioning RAM AIR switch is selected to ON, the differential pressure is less than 1 PSI. The ram air inlet opens and the outflow valve(FM: 8.20.40.2)
Opens to approximately 50 percent if the cabin pressure MODE SEL switch is in AUTO.
While pre-flighting, you hear a horn in the nose wheel well. Since the APU is NOT running, this may indicate a (FM: 8.20.40.4)
Duct overheat in the avionics ventilation system.
