On Board Maintenance System Overview
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Questions and Answers

What is the function of the MCDU?

  • To operate cabin systems
  • To display navigation data
  • To provide flight control
  • To read maintenance results (correct)

    • What does BITE stand for?

  • Bilateral Integration Test Equipment
  • Built In Test Equipment (correct)
  • Binary Information Testing Engine
  • Basic Integrated Test Environment

    • How many MCDUs can communicate with the CMC?

  • One
  • Three (correct)
  • Two
  • Four

    • Which system component is independent from its operational part?

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

    What is one method of retrieving the maintenance results?

    <p>By printing them on paper</p> Signup and view all the answers

    Which of the following functions does the CMC perform?

    <p>Communicates with aircraft system computers</p> Signup and view all the answers

    What does the Central Maintenance Computer (CMC) primarily interact with?

    <p>Computers of the aircraft systems</p> Signup and view all the answers

    Where is the BITE located?

    <p>Inside each aircraft system computer</p> Signup and view all the answers

    What is the role of the title line in the MCDU Display?

    <p>It displays the title of the selected display.</p> Signup and view all the answers

    How many data lines are arranged in the MCDU Display?

    <p>12 data lines in total.</p> Signup and view all the answers

    What does the scratchpad or message line provide to the operator?

    <p>Instruction prompts such as 'select desired system'.</p> Signup and view all the answers

    What font size is used for the data lines compared to the label lines?

    <p>Larger than the label lines.</p> Signup and view all the answers

    How are the data lines organized within the MCDU Display?

    <p>In pairs with a label above each data line.</p> Signup and view all the answers

    Which of the following components is NOT part of the MCDU Display?

    <p>Control panel</p> Signup and view all the answers

    What is indicated by the message on the scratchpad line?

    <p>Actions required by the operator.</p> Signup and view all the answers

    How is the MCDU Display designed to assist operators?

    <p>Through a visual display of data and messages.</p> Signup and view all the answers

    What does ACARS stand for in the context of aircraft systems?

    <p>Automated Communication Addressing and Reporting System</p> Signup and view all the answers

    What is indicated by the asterisk next to the line select key in the A340 MCDU display?

    <p>It marks the key for initiating the PRINT function</p> Signup and view all the answers

    What distinguishes the CMCS report functions on the different types of MCDUs?

    <p>The display messages and key selections vary</p> Signup and view all the answers

    Which aircraft's MCDU is specifically mentioned as having a PRINT message function?

    <p>Airbus A340</p> Signup and view all the answers

    What is the purpose of the line select keys on the MCDU?

    <p>They allow the selection of various functions</p> Signup and view all the answers

    In the ACARS data link context, what primarily occurs at the MCDU?

    <p>Messages are generated and managed</p> Signup and view all the answers

    What is shown on the MCDU display during the CMCS report function?

    <p>A PRINT message and selection options</p> Signup and view all the answers

    How is the ACARS data link displayed on the 747-400 MCDU?

    <p>Through a series of functional tabs</p> Signup and view all the answers

    What does the fault message primarily indicate?

    <p>The most probable cause of the fault.</p> Signup and view all the answers

    Which component is responsible for analyzing faults in this context?

    <p>Built-In Test Equipment (BITE)</p> Signup and view all the answers

    What information does the Central Maintenance Computer (CMC) store along with the fault?

    <p>The time and date of the fault occurrence.</p> Signup and view all the answers

    Which statement correctly describes the purpose of the data source displayed on the MCDU page?

    <p>It identifies the system computer that performed the failure analysis.</p> Signup and view all the answers

    What is typically included in a fault message according to the standardized format?

    <p>The LRU name and its equipment code.</p> Signup and view all the answers

    What function does the Slat Flap Control Computer (SFCC) serve in the fault message process?

    <p>It analyzes the fault.</p> Signup and view all the answers

    After a fault is detected and analyzed, where can the fault message typically be found?

    <p>On the fault message page of the post flight report.</p> Signup and view all the answers

    What does BITE stand for in the context of fault analysis?

    <p>Built-In Test Equipment</p> Signup and view all the answers

    What defines a hard failure in aircraft systems?

    <p>A permanent failure that cannot be resolved in-flight</p> Signup and view all the answers

    What characterizes an intermittent failure?

    <p>It occurs once or several times and is not reported after landing</p> Signup and view all the answers

    Which of the following is a NOT a characteristic of a hard failure?

    <p>It is a temporary issue</p> Signup and view all the answers

    In what instance is a failure likely to NOT be recorded in a post flight report?

    <p>If it is an intermittent failure</p> Signup and view all the answers

    What type of failure occurs continuously without interruption?

    <p>Hard failure</p> Signup and view all the answers

    How might a pilot best describe an intermittent failure during flight?

    <p>It does not appear in any reports</p> Signup and view all the answers

    Which failure type usually requires a troubleshooting process to identify?

    <p>Intermittent failure</p> Signup and view all the answers

    What is the primary distinction between hard and intermittent failures?

    <p>Hard failures are permanent while intermittent failures can disappear</p> Signup and view all the answers

    Study Notes

    MCDU Function

    • The MCDU serves as a central hub for aircraft data and functions, allowing pilots to access vital information and manage system operations.

    BITE Acronym

    • BITE stands for Built-In Test Equipment.

    CMC Communication

    • Multiple MCDUs can communicate with the Central Maintenance Computer (CMC).

    System Component Independence

    • The Central Maintenance Computer (CMC) is independent from its operational parts.

    Maintenance Results Retrieval

    • One way to retrieve maintenance results is through the Central Maintenance Computer (CMC).

    CMC Functions

    • The CMC processes and stores fault data.
    • The CMC facilitates communication between MCDUs and other aircraft systems.
    • The CMC helps to keep track of aircraft maintenance requirements.

    CMC Interaction

    • The Central Maintenance Computer (CMC) primarily interacts with the MCDU and other aircraft systems.

    BITE Location

    • The BITE is located within the aircraft's systems and helps to identify and diagnose faults.

    MCDU Title Line Role

    • The title line on the MCDU display provides context by indicating the current page or function.

    MCDU Data Lines Arrangement

    • The MCDU Display features multiple data lines arranged in a specific order for easy navigation.

    Scratchpad/Message Line Purpose

    • The scratchpad or message line serves as a communication channel for the operator, conveying messages or instructions.

    Data Line Font Size

    • Data lines in the MCDU Display are typically smaller than label lines, providing clearer hierarchy for information.

    Data Line Organization

    • Data lines are arranged in a logical manner, often grouped by related information or function.

    MCDU Display Component

    • The CMC (Central Maintenance Computer) is NOT a direct part of the MCDU Display.

    Scratchpad Message Indication

    • The message on the scratchpad line indicates a fault, warning, or system status.

    MCDU Display Design

    • The MCDU Display is designed to simplify information retrieval and communication for the operator.

    ACARS Meaning

    • ACARS stands for Aircraft Communications Addressing and Reporting System.

    Asterisk Indicator (A340)

    • The asterisk next to the line select key in the A340 MCDU display indicates an active function or selection.

    CMCS Report Function Distinction

    • Different types of MCDUs offer varying levels of CMCS report functions, influencing the data accessible to operators.
    • The Airbus A340 MCDU allows for a PRINT message function.

    Line Select Key Purpose

    • Line select keys on the MCDU allow users to navigate and activate specific lines or functions on the display.

    MCDU Role in ACARS

    • The primary role of the MCDU in the ACARS data link is communication and data transfer.

    MCDU Display During CMCS Report

    • During the CMCS report function, the MCDU display shows detailed maintenance information, including fault details, system status, and troubleshooting guidelines.

    ACARS Display on 747-400 MCDU

    • The 747-400 MCDU features a dedicated "ACARS" line that clearly indicates the status and communication channels of the ACARS data link.

    Fault Message Indication

    • A fault message primarily indicates a detected anomaly, malfunction, or deviation within a system.

    Fault Analysis Component

    • The BITE (Built-In Test Equipment) is primarily responsible for analyzing faults in aircraft systems.

    CMC Fault Storage

    • The Central Maintenance Computer (CMC) stores fault information along with the fault type, time of occurrence, and potential causes.

    Data Source Purpose

    • The data source displayed on the MCDU page provides context and identifies the origin of the information presented.

    Fault Message Format

    • A standardized fault message typically includes the affected system, the specific fault, the time of occurrence, and potential troubleshooting steps.

    SFCC Role

    • The Slat Flap Control Computer (SFCC) plays a role in identifying and reporting faults related to its controlled system.

    Fault Message Location

    • After a fault is detected and analyzed, the fault message is typically located at the CMC (Central Maintenance Computer) for further action.

    BITE Acronym (Fault Analysis)

    • BITE stands for Built-In Test Equipment, a component that helps diagnose and analyze faults in aircraft systems.

    Hard Failure Definition

    • A hard failure in aircraft systems is a permanent malfunction that completely prevents a system from functioning.

    Intermittent Failure Characteristics

    • An intermittent failure is characterized by a sporadic or unpredictable occurrence, where a system may function normally at times but malfunction at others.

    Hard Failure Characteristic

    • A hard failure is NOT characterized by its intermittent nature, as hard failures imply a permanent malfunction.

    Post Flight Report Exception

    • A failure is likely to NOT be recorded in a post flight report if it is a minor anomaly, does not significantly impact flight safety, and is easily resolved during pre-flight checks.

    Continuous Failure Type

    • A hard failure typically occurs continuously without interruption, meaning the system is permanently malfunctioning.

    Pilot Description of Intermittent Failure

    • A pilot might describe an intermittent failure during flight as a "temporary glitch", "sporadic issue", or "intermittent malfunction".

    Failure Requiring Troubleshooting

    • Intermittent failures usually require a troubleshooting process to identify the underlying cause and ensure a permanent solution.

    Hard vs. Intermittent Failure Distinction

    • The primary distinction between hard and intermittent failures lies in their consistency and predictability. Hard failures are permanent, while intermittent failures are sporadic and unpredictable.

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    Related Documents

    ATA 45 On Board Maintenance Systems Training Manual PDF

    Description

    This quiz covers the On Board Maintenance System, focusing on the Central Maintenance Computer (CMC) and Built In Test Equipment (BITE). It explores how these systems communicate with aircraft systems, report faults, and generate maintenance data. Test your understanding of the key components and functionalities involved in aircraft maintenance operations.

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