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Questions and Answers
What are the two independent systems that make up the Airflow Control System?
The right and left Air Conditioning Controllers (ACCs)
What is the function of the ozone converters located in the tail compartment?
They break down atmospheric ozone into oxygen.
Where are the temperature selector switches located for controlling the addition of hot air by the trim air valves?
On the BLEED AIR I TEMP CONTROL panel on the cockpit overhead.
What is the purpose of the RAM AIR switch on the TEMP CONTROL panel?
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How are the temperature control selectors on the TEMP CONTROL panel related to the trim air valves?
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What is the function of the Standby Multifunction Controller (SMC) in SEMI mode?
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How does the Manual Mode (MANUAL) operate in the Cabin Pressure Control System (CPCS)?
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What is the purpose of the Cabin Pressure Acquisition Module (CPAM) in the pressurization system?
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What is the purpose of the air conditioning system in an aircraft?
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How is the air for the air conditioning system cooled before being delivered throughout the airplane?
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How is the cabin altitude controlled within the aircraft?
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What is the primary function of the Cabin Pressure Controller (CPC) in the normal operating mode?
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How does the CABIN PRESSURE CONTROL panel enable the flight crew to manually control TROV shutters?
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What happens if a single CPC channel fails?
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What is the purpose of the Thrust Recovery Outflow Valve (TROV)?
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Where is the Cabin Pressure Acquisition Module (CPAM) located?
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Study Notes
Airflow Control System
- Comprised of two independent systems: the Environmental Control System (ECS) and the Cabin Pressure Control System (CPCS).
Ozone Converters
- Located in the tail compartment, they convert ozone into harmless oxygen, ensuring cabin air quality.
Temperature Selector Switches
- Positioned on the TEMP CONTROL panel, they regulate the addition of hot air via trim air valves.
RAM AIR Switch
- Allows for the introduction of outside air into the cabin, improving air circulation and cooling when required.
Temperature Control Selectors
- Adjust the temperature settings for each zone, influencing the operation of trim air valves to maintain desired climate.
Standby Multifunction Controller (SMC)
- Operates in SEMI mode, providing backup functionality and control over environmental systems during primary failures.
Manual Mode (CPCS)
- Enables flight crew to exert manual control over cabin pressure, essential for maintaining safe operating conditions.
Cabin Pressure Acquisition Module (CPAM)
- Monitors cabin pressure and communicates data to the CPC, critical for proper pressurization.
Air Conditioning System Purpose
- Maintains a comfortable environment for passengers and crew, regulating temperature and humidity within the aircraft.
Air Cooling Process
- Air for the air conditioning system is cooled using refrigerant systems or air cycle machines before distribution throughout the airplane.
Cabin Altitude Control
- Managed by the CPC, which adjusts cabin pressurization based on altitude to ensure passenger comfort and safety.
Cabin Pressure Controller (CPC) Function
- In normal operating mode, continuously monitors and adjusts cabin pressure to maintain a safe and comfortable altitude level.
CABIN PRESSURE CONTROL Panel Functionality
- Facilitates manual operation of Thrust Recovery Outflow Valve (TROV) shutters, allowing the crew to optimize cabin pressure levels as needed.
Single CPC Channel Failure
- A backup system activates to maintain pressure control, ensuring continued safe operation even with failure of one channel.
Thrust Recovery Outflow Valve (TROV) Purpose
- Regulates cabin pressure by controlling airflow out of the cabin, assisting in maintaining desired pressure conditions.
Cabin Pressure Acquisition Module (CPAM) Location
- Typically located in the electronics bay or near the cockpit, ensuring easy access for monitoring and adjustments.
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Description
Test your knowledge of aircraft temperature control systems with this quiz. Learn about how temperature readings are taken from temperature sensors in supply ducts and air conditioned zones, and how the TEMP DISPLAY pushbutton functions.
