Podcast
Questions and Answers
What is the function of the extraction fan in the forward cargo compartment?
What is the function of the extraction fan in the forward cargo compartment?
Under which condition is heating unavailable in the forward cargo compartment?
Under which condition is heating unavailable in the forward cargo compartment?
How is temperature regulated in the aft cargo compartment?
How is temperature regulated in the aft cargo compartment?
Which of the following components is NOT displayed on the ECAM Cond Page?
Which of the following components is NOT displayed on the ECAM Cond Page?
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What manages the isolation valves and extraction fan in the cargo ventilation system?
What manages the isolation valves and extraction fan in the cargo ventilation system?
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In which situation does the extraction fan in the aft cargo compartment run continuously?
In which situation does the extraction fan in the aft cargo compartment run continuously?
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What is the role of the trim air valve in the cargo heating system?
What is the role of the trim air valve in the cargo heating system?
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What happens to the heating system when the cargo pressure regulating valve is closed in the aft cargo compartment?
What happens to the heating system when the cargo pressure regulating valve is closed in the aft cargo compartment?
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Study Notes
Cargo Conditioning Overview
- Forward and aft cargo compartments are fully automated for air conditioning and heating.
- Ambient air enters compartments through an inlet isolation valve.
- Air is removed using an extraction fan (ground/low pressure) or discharged overboard via an outlet isolation valve.
- The Cargo Ventilation Controller manages valves and the extraction fan.
Forward Cargo Compartment
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Ventilation System:
- Extraction fan operates when on the ground or differential pressure is below 1 PSI.
- Air is extracted via isolation valves and discharged overboard.
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Heating System (if installed):
- Hot bleed air is supplied by a trim air valve.
- Controller monitors duct inlet and zone temperatures, adjusting the trim air valve for heating regulation.
- Heating is unavailable when the forward cargo door is open or the hot air valve is closed.
Aft Cargo Compartment
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Ventilation System:
- Similar to the forward compartment.
- Extraction fan runs continuously as long as isolation valves are open.
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Heating System (if installed):
- Hot bleed air is supplied via a cargo pressure regulating valve to the trim air valve.
- Controller regulates temperature by controlling the trim air valve.
Pilot Monitoring and Controls
- ECAM Cond Page: Displays inlet/outlet isolation valves, trim air valve, duct inlet temperature, zone temperature, hot air valve status for each cargo compartment.
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Overhead Panel - Cargo Heat Panel:
- Controls cargo heating/ventilation systems (if installed), including isolation valve push-button switches (auto) and temperature selectors.
- Temperature selectors send demand signals to adjust compartment temperature.
- Hot air push button switch controls aft cargo pressure regulating valve.
Operation Summary
- Normal Operation: Push button switches remain in auto position; set temperatures using selectors (mid-position approximately 15°C).
- System Automation: The system manages ventilation and heating based on environmental conditions requiring minimal pilot input.
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Description
Explore the automated air conditioning and heating systems in cargo compartments. Learn how the ventilation and heating mechanisms work, along with their operational conditions and controllers. This quiz covers the key features of both forward and aft cargo compartments.
