Aircraft Test Safety Features Quiz

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Questions and Answers

What action should be taken when a test result shows 'Pass'?

Select PCU/WTB TEST/RESET

Continue with the next test immediately

Press the LS key next to the 'Fail' message

Review the detailed test result (correct)

What is the purpose of selecting WTB/POB test in the complementary tests for the flap system?

To test moving parts of the Airbus system

To generate inputs to actuators and valves

To see an example of a complementary test (correct)

To bring the aircraft back to its status before the test

What must be fulfilled before starting a complementary test?

Ensure hydraulic system is pressurized or HYD ON (correct)

Press the line select key next to 'FAIL' message

Ground test for FLAP CONTROL - L

Confirm start by pressing a different LS key

What is the purpose of caution messages before starting a complementary test?

To advise on potential risks and conditions Signup and view all the answers

During a system test, what does a 'Fail' result prompt you to do?

Press LS key next to 'FAIL' message Signup and view all the answers

What does BITE do during the test procedure?

Generate inputs to actuators and valves Signup and view all the answers

What is the purpose of the Output Test Selection in the system?

To trigger a function in the cockpit for the operator to monitor Signup and view all the answers

What does the appearance of 'Prompt besides START SLEW UP AND DOWN' indicate during a test?

Correct data entry Signup and view all the answers

Why does the CAS dynamic slew test last 3 minutes?

To monitor the moving speed tape on the PFD accurately Signup and view all the answers

What happens at the end of an output test in the system?

Test OK or Test Fail indication Signup and view all the answers

Which action is required before starting a test in the system?

Inserting correct data Signup and view all the answers

What is the significance of 'THANK YOU AND GODBLESS US ALL!' at the end of the text?

Conveys good wishes to the operator Signup and view all the answers

What is the purpose of the 'ground test enable switch' mentioned in the text?

To enable test selection only when the aircraft is on the ground Signup and view all the answers

Why is it mentioned that the switch guard prevents inadvertent operation during flight?

To ensure safety by avoiding accidental operation during flight Signup and view all the answers

In what circumstances is a system test considered successful based on the text?

If all components responsible for a reported fault have been tested Signup and view all the answers

What is the purpose of running certain Boeing confidence tests during flight as mentioned in the text?

To ensure that the system is operational in real-time situations Signup and view all the answers

Why does the text emphasize that certain systems' electrical sensors are also tested during a system test?

To ensure comprehensive testing of the entire system Signup and view all the answers

When does a system test result show 'test OK' according to the text?

When no failure is detected and components have been properly tested Signup and view all the answers

Study Notes

Test Results and Safety Features

Test results are available for printout and datalink.
Tests are not allowed to run during flight to prevent influencing flight safety.
The CMCS prevents tests during flight by special safety features.

System Test

Primarily a computer test, comparable to the power-up test.
Certain systems and electrical sensors are tested.
Test results show:
- Test OK if no failure detected.
- Name of the LRU that failed the test, with a clear message.

Trusting Test Results

A test result can only be trusted if all components that could be responsible for a reported fault have been tested.
If in doubt, refer to the troubleshooting or maintenance manual to see the content of the test.

Output Test

Trigger a function in the cockpit, such as an indication, that the operator has to monitor and judge.
Examples include checking the airspeed tape indication on the primary flight display.
Correct data must be inserted before the test.
The CAS dynamic slew test monitors the moving speed tape on the PFD and lasts 3 minutes.

Boeing CMC Test Operation

Example of a ground test for FLAP CONTROL - L.
Test result appears when the test finishes, showing:
- Pass if no fault was found.
- Fail with detailed information to take corrective action.

CMCS Complementary Tests

Used when a component is not tested during the system test, such as moving parts of the airbus system.
Examples include PCU/WTB TEST/RESET and WTB/POB test.
Cautions and initial conditions must be fulfilled before the test, such as hydraulic system pressurization.
The test generates inputs to actuators and valves, checks the result by reading feedback signals, and presents a test result.

Test Close Up

Brings the aircraft back to the status before the test started.
A list of specific tests is available for each system.

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Description

Test your knowledge on safety features related to running tests on aircraft. Learn about the restrictions, safeguards, and special procedures in place to prevent tests during flights. Explore the importance of CMCS and boeing confidence tests in ensuring flight safety.