CMC Switching and ARINC 429 Link
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Questions and Answers

What is a key difference between Type 3 systems and other systems?

  • They can memorise failure messages.
  • They have a multifunction control display unit.
  • They have a discrete output.
  • They cannot memorise failure messages. (correct)

    • What is the primary function of the Central Maintenance Computers (CMCs)?

  • To initialise the dialogue with the MCDUs.
  • To acquire and process information from aircraft systems. (correct)
  • To store data concerning aircraft systems in non-volatile memories.
  • To display data on the Multifunction Control Display Unit.

    • What is the purpose of guided tests in the MCDU?

  • To initialise the dialogue with the CMCs.
  • To perform self-tests on aircraft systems.
  • To display data on the Multifunction Control Display Unit.
  • To perform fault-finding on aircraft systems. (correct)

    • How do the CMCs store data concerning aircraft systems?

    <p>In non-volatile memories.</p> Signup and view all the answers

    What is the function of the line keys on the Multifunction Control Display Unit?

    <p>To send commands to the connected systems.</p> Signup and view all the answers

    How do operators access the CMC functions?

    <p>Through the CMS menu.</p> Signup and view all the answers

    What is the consequence of a Class 2 failure on the current flight?

    <p>It has no operational consequences</p> Signup and view all the answers

    Where are Class 3 failures only available?

    <p>On the ground through the MCDU</p> Signup and view all the answers

    What is the primary function of Type 1 system computers?

    <p>To memorise failures from the last 64 flights</p> Signup and view all the answers

    What is the output connection of Type 2 system computers?

    <p>ARINC 429 output bus</p> Signup and view all the answers

    How do Type 1 system computers connect to the CMCs?

    <p>Through both ARINC 429 input and output buses</p> Signup and view all the answers

    What is the purpose of the ECAM STATUS page?

    <p>To identify systems affected by Class 2 failures</p> Signup and view all the answers

    What is the primary purpose of the ARINC 429 link between CMC 1 and CMC 2?

    <p>To enable cross talk between CMCs for master/slave status and fault detection</p> Signup and view all the answers

    What type of failures are displayed as a warning in real-time on the ECAM and are available on the MCDU?

    <p>Class 1 failures with operational consequences</p> Signup and view all the answers

    What is the purpose of the CMC recording failure information and messages in a non-volatile memory system?

    <p>To allow for recall of fault codes and messages if necessary</p> Signup and view all the answers

    What happens to warnings displayed on the ECAM display unless they are cancelled?

    <p>They are displayed until the end of the flight</p> Signup and view all the answers

    What is the function of the flight warning computers?

    <p>To monitor the operational data in order to display warnings and system information</p> Signup and view all the answers

    What is the primary function of the ECAM display?

    <p>To display warnings and system information</p> Signup and view all the answers

    What is the primary characteristic of a Class 1 EFB system?

    <p>It is a portable, Commercial Off-the-Shelf computer system</p> Signup and view all the answers

    Which type of EFB system requires administrative control before use?

    <p>Class 2</p> Signup and view all the answers

    What is a key difference between Class 1 and Class 2 EFB systems?

    <p>Mounting device connection</p> Signup and view all the answers

    What is the primary use of an Electronic Flight Bag (EFB) system?

    <p>To perform a variety of tasks previously requiring reference books and charts</p> Signup and view all the answers

    What is an alternative term for a Class 1 EFB system?

    <p>Portable Electronic Device (PED)</p> Signup and view all the answers

    What document contains descriptions of EFB classes?

    <p>AC 120-76A</p> Signup and view all the answers

    What enables ground support personnel to interface directly with the server from outside the aircraft?

    <p>Wireless link</p> Signup and view all the answers

    What is the primary function of the LoadStar software?

    <p>To control the configuration of loadable software on each aircraft type</p> Signup and view all the answers

    What is the name of the on-board data loaders on later-generation Boeing aircraft?

    <p>Maintenance Access Terminals (MATs)</p> Signup and view all the answers

    What is the dual Operating System (OS) software supported by the PMAT/NT?

    <p>Aircraft OS and Windows NT</p> Signup and view all the answers

    What connects to the back of the Portable Data Loaders (PDL) and supplies the airplane with ARINC data buses?

    <p>Interface cable</p> Signup and view all the answers

    What is the name of the on-board data loaders on Airbus aircraft?

    <p>Multipurpose Disc Drive Units (MDDUs)</p> Signup and view all the answers

    Study Notes

    Key Differences between Type 3 and Other Systems

    • Type 3 systems are distinguished by their specific operational limitations compared to Type 1 and Type 2 systems.

    Central Maintenance Computers (CMCs) Functions

    • CMCs monitor and diagnose aircraft systems, ensuring optimal operation and safety.
    • They store crucial data about aircraft systems in non-volatile memory for reliability.

    Guided Tests in the MCDU

    • Guided tests assist operators in troubleshooting and maintaining aircraft systems effectively.

    CMC Data Storage

    • CMCs utilize non-volatile memory to retain aircraft systems data, ensuring preservation during power loss.

    Multifunction Control Display Unit (MCDU) Line Keys

    • Line keys allow operators to interact with various operations within the MCDU, facilitating system management.

    Accessing CMC Functions

    • Operators can access CMC functions through the MCDU interface, simplifying control and monitoring.

    Consequences of Class 2 Failures

    • A Class 2 failure can affect flight operations but typically does not compromise safety or necessitate immediate action.

    Class 3 Failures Availability

    • Class 3 failures are specific to maintenance scenarios and typically not presented during regular flight operations.

    Primary Function of Type 1 System Computers

    • Type 1 systems are responsible for critical flight control and navigation tasks.

    Type 2 System Computers Output Connection

    • Type 2 system computers connect to multiple data buses for transmitting vital information.

    Type 1 System Computers Connectivity to CMCs

    • They connect to CMCs through dedicated communication links for data exchange.

    ECAM STATUS Page Purpose

    • The ECAM STATUS page provides real-time information regarding the current health and status of aircraft systems.
    • The primary function is to ensure reliable data exchange between CMC 1 and CMC 2, enhancing redundancy and system integrity.

    Real-Time Warnings on ECAM and MCDU

    • Failures such as engine warnings and system malfunctions are displayed in real-time for immediate awareness.

    CMCs Non-Volatile Memory System

    • Recording failure information in a non-volatile memory system ensures that critical data is retrievable even after power loss.

    Warnings on ECAM Display

    • Warnings displayed remain active until explicitly canceled, ensuring continuous alertness to potential issues.

    Flight Warning Computers Function

    • They analyze aircraft data to detect and warn of anomalies affecting flight safety and performance.

    Primary Function of ECAM Display

    • The ECAM displays operational data and alerts, aiding pilots in monitoring aircraft performance.

    Class 1 EFB System Characteristic

    • Features primarily support flight operations without direct administrative control for use.

    Administrative Control Requirement for EFB Systems

    • Class 2 EFB systems require administrative control before they can be utilized in operational scenarios.

    Class 1 vs. Class 2 EFB Systems

    • Class 1 systems do not require pre-approval for use, while Class 2 systems mandate specific administrative oversight.

    Primary Use of Electronic Flight Bag (EFB) System

    • EFB systems are mainly employed to manage flight-related documents and improve cockpit efficiency.

    Alternative Term for Class 1 EFB

    • Some refer to Class 1 EFB systems as Portable Electronic Flight Bags (PEFB).

    Document Describing EFB Classes

    • The guidelines that outline EFB classes are typically detailed in aviation regulatory documentation.

    Ground Support Personnel Interface

    • Remote access to the aircraft's server enables ground support personnel to perform diagnostics and updates.

    LoadStar Software Function

    • LoadStar software is responsible for loading and managing flight data efficiently across various systems.

    On-Board Data Loaders on Boeing Aircraft

    • Latest Boeing aircraft utilize Dedicated Data Loaders for crucial data management tasks.

    Dual Operating System Software

    • PMAT/NT supports two different operating systems for versatile operational capabilities.

    Connections for Portable Data Loaders (PDL)

    • PDLs connect to aircraft systems through ARINC data buses, facilitating data transfer.

    On-Board Data Loaders on Airbus Aircraft

    • Airbus employs specific data loading systems designed for their aircraft models to streamline data management.

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    Related Documents

    On-Board Maintenance Systems PDF

    Description

    This quiz covers the interface between CMC 1 and CMC 2 via ARINC 429 link, enabling data exchange and master-slave selection. It's relevant to aircraft systems, particularly Flight Warning Computers and ECAM Display.

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