Podcast
Questions and Answers
CMC tests are only available for Airbus systems.
CMC tests are only available for Airbus systems.
False
Ground tests are available for all major systems in the Boeing CMC system.
Ground tests are available for all major systems in the Boeing CMC system.
True
Output tests are available in all systems in the Airbus CMC system.
Output tests are available in all systems in the Airbus CMC system.
False
The test procedure involves selecting the system to test and then pressing the line select key to choose the test.
The test procedure involves selecting the system to test and then pressing the line select key to choose the test.
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The Boeing CMC system offers confidence tests for all systems.
The Boeing CMC system offers confidence tests for all systems.
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During a CMC test, the display shows 'test in progress' while the system computer controls the necessary test steps.
During a CMC test, the display shows 'test in progress' while the system computer controls the necessary test steps.
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The system computer sends the most probable cause of a fault to CMC.
The system computer sends the most probable cause of a fault to CMC.
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The cockpit effect and fault message are completely unrelated.
The cockpit effect and fault message are completely unrelated.
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The Leg Report shows the flight deck effect.
The Leg Report shows the flight deck effect.
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The message number allows you to quickly find the fault isolation manual.
The message number allows you to quickly find the fault isolation manual.
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Failure correlation involves comparing different sources of information.
Failure correlation involves comparing different sources of information.
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Modern CMC always automatically performs failure correlation.
Modern CMC always automatically performs failure correlation.
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The 'ground test enable switch' interrupts all test signals when it is in the NORMAL position.
The 'ground test enable switch' interrupts all test signals when it is in the NORMAL position.
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The CMCS allows tests to run during flight due to special safety features.
The CMCS allows tests to run during flight due to special safety features.
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The switch guard is designed to prevent inadvertent operation during flight.
The switch guard is designed to prevent inadvertent operation during flight.
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System tests need special preconditions before they can be conducted.
System tests need special preconditions before they can be conducted.
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If no failure is detected in a system test, the result will show a clear message indicating the failed LRU.
If no failure is detected in a system test, the result will show a clear message indicating the failed LRU.
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A clear message in a system test result confirms the failure of the CSU as the most probable cause.
A clear message in a system test result confirms the failure of the CSU as the most probable cause.
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Study Notes
CMC Test Availability and Types
- CMC tests are specific to Airbus systems.
- Ground tests are accessible for all major systems within the Boeing CMC system.
- Output tests are included in all Airbus CMC systems.
Test Procedure
- Tests require selecting a specific system and pressing the line select key.
- The display indicates 'test in progress' while the system computer manages the testing process.
Fault Management and Reporting
- Boeing CMC system features confidence tests applicable to all systems.
- The system computer relays the most likely fault cause to the CMC.
- Cockpit effects and fault messages are not related.
- The Leg Report provides information about flight deck effects.
- Message numbers facilitate quick reference to the fault isolation manual.
Failure Correlation and Automatic Processes
- Failure correlation entails comparing various information sources to identify issues.
- Modern CMC systems automatically conduct failure correlation.
Safety Features
- The 'ground test enable switch' halts all test signals when set to the NORMAL position.
- The CMCS is designed to allow testing during flight, incorporating safety features.
- Switch guards are implemented to prevent accidental operations while in-flight.
Test Preconditions and Results
- System tests must meet specific conditions before execution.
- No detected failures during a test will display a clear message identifying the failed Line Replaceable Unit (LRU).
- A clear message indicating a failure confirms the Centralized Status Unit (CSU) as the probable cause.
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Description
Learn about safety features and procedures related to conducting tests on aircraft systems during flight. Understand how the CMCS prevents tests during flight and specific safety measures in place. Explore the importance of proper test sequences and switches for aviation safety.
