Temperature Control Module Overview
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Questions and Answers

What is the primary function of the pressure sensor (P1) in the conditioned service air system?

  • It measures humidity levels.
  • It regulates airflow in the duct.
  • It monitors the conditioned air pressure. (correct)
  • It controls the temperature of the air.

    • Where is the pressure sensor (P1) located?

  • In the bleed air duct. (correct)
  • In the engine compartment.
  • In the cabin of the aircraft.
  • In the fuel tank.

    • What type of signals does the pressure sensor (P1) transmit?

  • Acoustic signals.
  • Electrical signals. (correct)
  • Optical signals.
  • Mechanical signals.

    • Which components does the pressure sensor (P1) transmit its signals to?

    <p>Control circuit units (CCUs).</p> Signup and view all the answers

    In the context of the conditioned service air system, how many CCU channels does the pressure sensor (P1) communicate with?

    <p>Two.</p> Signup and view all the answers

    What does the acronym CCU stand for in this context?

    <p>Control Circuit Unit.</p> Signup and view all the answers

    Which type of sensor is mentioned alongside the pressure sensor (P1) for monitoring air conditions?

    <p>Temperature sensor (T1).</p> Signup and view all the answers

    What is an important aspect of the pressure sensor's construction based on the information provided?

    <p>It is a single sensor.</p> Signup and view all the answers

    What is the primary purpose of the ozone converter in the system?

    <p>To decrease ozone concentration in the air</p> Signup and view all the answers

    Which component is responsible for monitoring the temperature of the conditioned air?

    <p>Temperature sensor (T1)</p> Signup and view all the answers

    How does the bypass valve function in the TCM?

    <p>It adds hot bleed air to increase temperature if necessary</p> Signup and view all the answers

    What is the role of the pressure sensor (P1) in the conditioned service air system?

    <p>To monitor the pressure of the conditioned air</p> Signup and view all the answers

    What does the CSAS heat exchanger do in the temperature control module?

    <p>It decreases the temperature of the hot bleed air</p> Signup and view all the answers

    Why is the ozone converter important for the Air Separation Modules (ASMs)?

    <p>It protects ASM fibers from damage</p> Signup and view all the answers

    What is the main benefit of using a catalytic process in ozone conversion?

    <p>It decreases ozone concentration effectively</p> Signup and view all the answers

    In what scenario would the bypass valve typically activate?

    <p>When the temperature needs to be increased</p> Signup and view all the answers

    What is the significance of the Inert Gas Generating System (IGGS) in the context of conditioned air?

    <p>It utilizes conditioned air for aircraft safety</p> Signup and view all the answers

    What component is primarily responsible for reducing the temperature of air in the conditioned service air system?

    <p>CSAS heat exchanger</p> Signup and view all the answers

    What is the primary function of the CCU within the Conditioned Service Air System?

    <p>To communicate with the IGGS Control Unit and monitor parameters</p> Signup and view all the answers

    What specific conditions can cause the CCU to stop the Conditioned Service Air System?

    <p>Excessive internal temperature</p> Signup and view all the answers

    Where is the CCU installed in the aircraft?

    <p>In the avionics bay</p> Signup and view all the answers

    Which parameter does the CCU NOT monitor within the CSAS?

    <p>Cabin pressure levels</p> Signup and view all the answers

    Which system is directly linked to the CCU for communication?

    <p>IGGS Control Unit</p> Signup and view all the answers

    What happens to the Conditioned Service Air System if the CCU determines the internal temperature is too high?

    <p>It will stop the system</p> Signup and view all the answers

    What does the abbreviation FTIS stand for within the context of the Conditioned Service Air System?

    <p>Fuel Tank Inerting System</p> Signup and view all the answers

    Which aspect of the CSAS does the CCU specifically monitor?

    <p>Inlet temperature and pressure</p> Signup and view all the answers

    What action does the ICU take when the center tank fuel volume reaches 95% of its maximum level?

    <p>It closes all fuel valves.</p> Signup and view all the answers

    What happens if communication between the ICU and the FCMCs fails for more than 120 seconds?

    <p>The ICU sends a fault report.</p> Signup and view all the answers

    Which component acts as the master in the communication chain described?

    <p>CCU</p> Signup and view all the answers

    Under what condition does the IGGS stop the operation of its valves?

    <p>When the fuel volume is 95% of maximum.</p> Signup and view all the answers

    What is the role of the ICU regarding temperature control?

    <p>It stops operations during internal over-temperature.</p> Signup and view all the answers

    Which two components communicate with the ICU for redundancy?

    <p>ADIRU 1 and ADIRU 3</p> Signup and view all the answers

    What is the primary function of the Fuel Control and Monitoring Computers (FCMCs)?

    <p>Monitoring fuel volume and density.</p> Signup and view all the answers

    What triggers the fuel system to restart its operation after closing valves?

    <p>When the fuel quantity drops below 90% of the maximum level.</p> Signup and view all the answers

    What is the main function of the D-ULPA filter assembly?

    <p>To remove pollutants and droplets that could damage ASM fibers.</p> Signup and view all the answers

    Which component of the D-ULPA filter assembly is responsible for drainage?

    <p>The bowl.</p> Signup and view all the answers

    What is the recommended replacement interval for the filter cartridge in the D-ULPA filter assembly?

    <p>7,000 Flight Hours.</p> Signup and view all the answers

    How does the design of the unit housing of the D-ULPA filter assembly affect its maintenance?

    <p>It does not have a service life limit.</p> Signup and view all the answers

    What is the role of the IGGS temperature sensor (T2)?

    <p>To prevent warm gases from entering the fuel tank.</p> Signup and view all the answers

    Which of the following statements is true regarding the manifold of the D-ULPA filter assembly?

    <p>It includes both an inlet and an outlet port.</p> Signup and view all the answers

    Which part of the D-ULPA filter assembly is disposable?

    <p>The filter cartridge.</p> Signup and view all the answers

    What issue could arise if the D-ULPA filter assembly is not maintained properly?

    <p>Potential damage to ASM fibers.</p> Signup and view all the answers

    What does the drain port in the bowl of the D-ULPA filter assembly facilitate?

    <p>Removal of accumulated contaminants.</p> Signup and view all the answers

    During maintenance of the D-ULPA filter assembly, what is the main task that needs to be performed?

    <p>Replace the internal filter element.</p> Signup and view all the answers

    What is the purpose of the ozone converter in the conditioned service air system?

    <p>To reduce ozone concentration to protect ASMs</p> Signup and view all the answers

    Which component is not included in the Temperature Control Module (TCM)?

    <p>Pressure regulator</p> Signup and view all the answers

    How does the bypass valve function in the conditioned service air system?

    <p>It mixes hot bleed air with cold air to regulate temperature</p> Signup and view all the answers

    Which factor does the pressure sensor (P1) specifically monitor in the conditioned air system?

    <p>The pressure of the conditioned air</p> Signup and view all the answers

    What is a consequence of high ozone concentration in the air supplied to the TCM?

    <p>Damage to the fibers of the ASMs</p> Signup and view all the answers

    Which element of the TCM is responsible for monitoring the flow of air to the IGGS?

    <p>Temperature sensor (T1)</p> Signup and view all the answers

    What role does the CSAS heat exchanger play in the temperature control process?

    <p>Decreases the temperature of hot bleed air</p> Signup and view all the answers

    What happens if the ozone concentration is not adequately controlled in the conditioned service air system?

    <p>Corrosion of aircraft components</p> Signup and view all the answers

    Which best describes the operation of the TCM's temperature sensor (T1)?

    <p>It monitors temperature before and after the heat exchanger</p> Signup and view all the answers

    What does the catalytic process employed by the ozone converter primarily achieve?

    <p>Converts ozone into oxygen and other benign substances</p> Signup and view all the answers

    What is the purpose of the locking mechanism in the CIV during tests?

    <p>To ensure the valve remains closed and isolates leaks.</p> Signup and view all the answers

    Which of the following statements regarding the closure of the CIV for aircraft dispatch is accurate?

    <p>Closing the CIV is optional under the Master Equipment List (MEL).</p> Signup and view all the answers

    Where is the ozone converter located in relation to other components?

    <p>Between the CIV and the Heat Exchanger.</p> Signup and view all the answers

    What role does the CSAS Isolation Valve (V1) perform?

    <p>To isolate different sections of the conditioned service air system.</p> Signup and view all the answers

    In the context of the content provided, what is the main concern addressed by locking the CIV during testing?

    <p>Isolating and preventing possible leaks.</p> Signup and view all the answers

    What could the consequence be if the CIV is not properly locked during tests?

    <p>Potential leaks and unsafe conditions may occur.</p> Signup and view all the answers

    What is not a function of the ozone converter as described?

    <p>Enhancing the chemical properties of the conditioned air.</p> Signup and view all the answers

    Which statement about the integration of the CIV in the system is incorrect?

    <p>The CIV has no effect on aircraft dispatch procedures.</p> Signup and view all the answers

    What is a primary characteristic of the manual override feature of the CIV?

    <p>It allows for manual control to ensure isolation during tests.</p> Signup and view all the answers

    What occurs if the CIV is improperly operated during maintenance procedures?

    <p>There may be an increase in leak risks and system failures.</p> Signup and view all the answers

    What is the starting point for the NEA pipe in the Inert Gas Generation System?

    <p>The IGGS pallet</p> Signup and view all the answers

    Where does the NEA pipe route after leaving the IGGS pallet?

    <p>Behind the mixer unit</p> Signup and view all the answers

    What specific purpose does the dual flow shut-off valve serve in the inert gas generation system?

    <p>Controls the flow of inert gas</p> Signup and view all the answers

    Which component is NOT associated with the NEA pipe's routing?

    <p>Auxiliary power unit</p> Signup and view all the answers

    What is the primary application of the inert gas generation system in aviation?

    <p>To reduce the risk of fuel fires</p> Signup and view all the answers

    In the configuration described, how does the NEA pipe contribute to the overall Inert Gas Generation System's operation?

    <p>It transports inert gas to the combustion chamber</p> Signup and view all the answers

    Which part of the aircraft is referenced in relation to the inert gas generation system?

    <p>Forward cargo compartment</p> Signup and view all the answers

    Which of the following best describes the location of the mixer unit in relation to the NEA pipe?

    <p>At the rear of the forward cargo compartment</p> Signup and view all the answers

    What is a critical factor that must be considered when maintaining the NEA pipe system?

    <p>Proper sealing to avoid leaks</p> Signup and view all the answers

    What action does the ICU take when T1 detects an air temperature equal to or higher than 120°C?

    <p>The ICU closes the valves and latches the fault.</p> Signup and view all the answers

    Which temperature condition will cause the IGGS to stop immediately according to the ICU's control logic?

    <p>When T2 detects an air temperature equal to or higher than 90°C.</p> Signup and view all the answers

    How does the ICU respond if T2 detects an air temperature between 66°C and 75°C for 1 minute?

    <p>The IGGS changes to mid-flow mode if it was in high-flow.</p> Signup and view all the answers

    What is required to erase a fault latched by the ICU when T1 detects a temperature equal to or higher than 125°C?

    <p>A power cycle followed by a satisfactory BITE test.</p> Signup and view all the answers

    Under what circumstances does the IGGS stop completely?

    <p>When T2 detects a temperature between 66°C and 75°C for 3 minutes.</p> Signup and view all the answers

    If T2 detects an air temperature between 75°C and 85°C for 2 minutes, what will occur?

    <p>The fault will be latched by the ICU.</p> Signup and view all the answers

    What does the ICU use as a backup protection if a failure occurs in the digital section?

    <p>The analog section.</p> Signup and view all the answers

    What must happen for the ICU to erase a fault latched due to T2 detecting a temperature ≥ 85°C?

    <p>A satisfactory BITE test.</p> Signup and view all the answers

    What is the primary purpose of conducting tests for FTIS maintenance?

    <p>To ensure the proper functionality of the inert gas generation system</p> Signup and view all the answers

    How many tests must be performed for FTIS maintenance as stated in the guidelines?

    <p>6 tests</p> Signup and view all the answers

    In the context of inert gas generation systems, what is the significance of over-temperature protection?

    <p>It prevents system failure due to excessive heat</p> Signup and view all the answers

    What is the role of the inert gas generating system in fuel inerting?

    <p>To reduce the likelihood of fire during fuel storage</p> Signup and view all the answers

    Which document should be referenced for applicable instructions and values concerning FTIS maintenance tests?

    <p>Aviation Maintenance Manual (AMM)</p> Signup and view all the answers

    What type of training is indicated for personnel involved in the inert gas generation system processes?

    <p>Deviation Training Services</p> Signup and view all the answers

    What might be a common consequence of not following the AMM tasks for the FTIS maintenance tests?

    <p>Increased likelihood of system failures</p> Signup and view all the answers

    Inert gas generation is critical for which of the following purposes in an aircraft?

    <p>Preventing fire hazards in fuel storage</p> Signup and view all the answers

    Study Notes

    Ozone Converter

    • Ozone converter decreases ozone concentration in air supplied to TCM
    • Protects Air Separation Modules fibers

    Temperature Control Module (TCM)

    • Includes heat exchanger, bypass valve, temperature sensor (T1) and pressure sensor (P1)
    • Heat exchanger decreases temperature of hot bleed air
    • Bypass valve adds hot bleed air to increase temperature
    • Temperature sensor (T1) monitors conditioned air temperature to IGGS
    • Pressure sensor (P1) monitors conditioned air pressure to IGGS

    Temperature Sensor T1

    • Monitors conditioned air temperature that flows to the Inert Gas Generating System (IGGS)

    Pressure Sensor (P1)

    • Monitors conditioned air pressure that flows to the IGGS
    • Installed in bleed air duct
    • Transmits signals to the two CCU channels

    CSAS Control Unit (CCU)

    • Installed in the avionics bay
    • Communicates with IGGS Control Unit (ICU)
    • Monitors:
      • Fuel Tank Inerting System (FTIS) inlet temperature
      • Fuel Tank Inerting System (FTIS) inlet pressure
    • Stops system if necessary when internal temperature becomes too high
    • Function: removes pollutions, debris or droplets from air
    • Prevents damage to ASMs fibers

    D-ULPA Filter

    • Includes a manifold, a bowl, and a disposable filter cartridge
    • Manifold attached to the pallet with inlet and outlet ports
    • Bowl has a drain port
    • Unit housing design does not have a service life limit
    • Filter cartridge replacement interval: 7,000 Flight Hours

    Inert Gas Generation System (IGGS)

    • Temperature Sensor (T2) prevents injection of hot gases from CSAS into fuel tank
    • IGGS is controlled by the ICU
    • IGGS stops when volume of fuel in center tank is 95% of maximum fuel level
    • IGGS starts again when fuel quantity becomes less than 90% of maximum fuel level
    • ICU communicates with:
      • CCU (master)
      • ADIRU1 and ADIRU3
      • Fuel Control and Monitoring Computers (FCMCs)
      • Flight Data Interface Management Unit (FDIMU)

    Fuel Control and Monitoring Computers (FCMCs)

    • Send data to ICU about:
      • Fuel density
      • Center tank fuel quantity
      • FCMC labels
    • Used to know volume of fuel in the center tank
    • If no communication from FCMCs for more than 120 seconds, ICU sends a fault report

    CSAS Isolation Valve (V1)

    • Valve is locked during tests to prevent leaks
    • Not required to be closed for flight operations
    • Locking mechanism offers manual override
    • Provides isolation during testing

    Ozone Converter

    • Located between the CIV and Heat Exchanger
    • Uses a catalytic process to decrease ozone concentration in the air supplied to the TCM
    • Protects Air Separation Modules (ASMs) fibers

    Temperature Control Module (TCM)

    • Contains a CSAS heat exchanger, a bypass valve, a temperature sensor (T1), and a pressure sensor (P1)
    • CSAS heat exchanger cools hot bleed air from the pneumatic system
    • Bypass valve adds hot bleed air to increase temperature if needed
    • Temperature sensor (T1) monitors conditioned air temperature flowing to the IGGS
    • Pressure sensor (P1) monitors conditioned air pressure flowing to the IGGS

    Inert Gas Generation System (IGGS)

    • Contains a dual flow shut-off valve (DFSOV), an inert gas valve (IGV), and two temperature sensors (T1 and T2)
    • The DFSOV is used to control the flow of inert gas from the IGGS
    • The IGV is used to manage the flow of inert gas to the fuel tanks
    • The temperature sensors monitor air temperature to prevent overheating
    • Controls the flow of inert gas to the fuel tanks

    FTIS Pipe Routing

    • NEA pipe starts from the IGGS pallet and runs behind the mixer unit in the rear part of the forward cargo compartment
    • Overheating is prevented by the ICU, the temperature sensors (T1 and T2), the IGV, and the DFSOV
    • ICU has digital and analog sections:
      • Digital section controls valves to close when T1 detects 120°C or higher, latches this fault for erasure by a satisfactory BITE test
      • Analog section controls valves to close when T1 detects 125°C or higher, latches this fault for erasure by a power cycle followed by a satisfactory MCDU BITE test
    • ICU digital section controls the valves to close in the following conditions:
      • T2 detects 85°C or higher, IGGS stops immediately, fault latched for erasure by a satisfactory BITE test
      • T2 detects 75°C to 85°C for 2 minutes, IGGS stops, fault latched
      • T2 detects 66°C to 75°C for 1 minute, IGGS switches to mid-flow mode if in high-flow, if condition continues for 1 minute more, IGGS changes to low-flow mode, if condition continues for 3 minutes, IGGS stops, fault latched
      • T2 detects 90°C or higher, IGGS stops immediately

    Over-Temperature Protection

    • The ICU, the temperature sensors (T1 and T2), the IGV, and the DFSOV all contribute to preventing the system from overheating

    Tests

    • Six tests are conducted for FTIS maintenance, refer to AMM for instructions and values

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    Related Documents

    A330-200/300 Fuel Inerting Training Manual PDF

    Description

    This quiz covers the components and functions of the Temperature Control Module (TCM) and associated systems, including the ozone converter, temperature sensors, and pressure sensors. Test your knowledge on the operation and significance of these systems in maintaining air quality and temperature control.

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