14 Questions
Where is the conditioned air distributed to in the aircraft?
Cockpit, fwd and aft cabins
What happens when the hot air fault light illuminates on the air conditioning panel?
The hot air press. reg. valve closes and the trim air valves open.
What type of air does the trim air provide to the air conditioning system?
Warm air
In case of zone controller primary and secondary channel failure, what temperatures are maintained by pack one and pack two?
Both pack one and pack two maintain cold temperatures
What controls the temperature of the cooling air in normal flight in closed circuit configuration?
Extracting air overboard
When should the Ram air switch be used to enable Ram air to the mixture unit?
Only after outflow valve is fully opened
What happens in the event of a pack controller primary channel failure?
The secondary computer takes over (all functions as normal)
In the event of a pack controller secondary channel failure, what happens?
Pack outlet temperature is controlled at 15 deg C
What happens in the event of both primary and secondary channel failure of the pack controller?
The packs deliver a fixed temperature of 20 deg C
In the event of a hot air pressure reg. valve failed open, what happens?
Cabin temperature will be controlled at the upper limit 30 deg C
When bleed air is supplied from the APU (APU bleed valve open), what is the automatically selected pack flow?
Normal
What does each trim air valve optimize the temperature by?
Adding fresh air
What does the hot air pressure regulating valve do?
Regulates the pressure of hot air tapped upstream of the packs
What type of operation does the pack flow control valve have?
Is pneumatically operated and electrically controlled
Study Notes
Air Distribution in the Aircraft
- Conditioned air is distributed to the cabin, flight deck, and avionics compartments.
Air Conditioning Panel Indications
- The hot air fault light illuminates when there is a hot air fault.
Trim Air Function
- The trim air provides cooled air to the air conditioning system.
Zone Controller Failure
- In case of primary and secondary channel failure, pack one maintains 18°C (64°F) and pack two maintains 24°C (75°F).
Temperature Control in Normal Flight
- The temperature of the cooling air in normal flight in closed circuit configuration is controlled by the air cycle machine.
Ram Air Switch
- The Ram air switch should be used to enable Ram air to the mixture unit when the aircraft is on the ground or in flight below 20,000 ft.
Pack Controller Failure
- In the event of a pack controller primary channel failure, the secondary channel takes control.
- In the event of a pack controller secondary channel failure, the primary channel takes control.
- In the event of both primary and secondary channel failure, the pack controller defaults to a fixed temperature.
Hot Air Pressure Regulating Valve Failure
- If the hot air pressure reg.valve fails open, hot air pressure increases, and the air conditioning system may overheat.
APU Bleed Air Supply
- When bleed air is supplied from the APU (APU bleed valve open), pack 1 flow is automatically selected.
Trim Air Valve Function
- Each trim air valve optimizes the temperature by ±1°C (±1.8°F).
Hot Air Pressure Regulating Valve Function
- The hot air pressure regulating valve regulates the hot air pressure to the air conditioning system.
Pack Flow Control Valve Operation
- The pack flow control valve has a modulating operation.
Test your knowledge of A320 technical aspects with this quiz which covers topics like air conditioning, pressurization, ventilation, engines, autoflight, landing gear, doors, and more. Stay updated with the latest information as of 11th Oct 2022.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
