EGPWS LINE MAINTENANCE MANUAL

3.7 LEVEL 5 SELF-TEST - ALERT HISTORY

Level 5 Self-Test provides enunciation of the alerts (cautions and warnings) recorded over the last 10 flight legs. Level 5 Self-Test is initiated by pressing the cockpit Self-Test button within 3 seconds of the end of Level 4 Self- Test.

If any alerts were recorded in the last ten flight legs then voice sequence as described in the following table will be enunciated. Otherwise, the message “NO WARNINGS” will be enunciated.

During Level 5 Self-Test, a Short Cancel bumps the enunciation to the next flight leg with faults (if any).

During Level 5 Self-Test, a Long Cancel terminates the Self-Test level and “PRESS TO CONTINUE” is enunciated for proceeding to Level 6 Self-Test.

TABLE 3-9: LEVEL 5 SELF-TEST INFORMATION

THE FOLLOWING INFORMATION IS GIVEN IN THE LEVEL 5 SELF-TEST:

1.Enunciate the number of the most recent flight leg with alerts as “FLIGHT X”, where “X” is a number from 1 to 10 where 1 is the most recent flight leg

2.Enunciate any alerts stored for leg X

3.Increment to next oldest leg with alerts (if any) and repeat the above sequence

For Example:

If a glideslope alert were given 7 flight legs earlier, the messages would be:

“WARNING HISTORY” “FLIGHT 7”

“GLIDESLOPE” “PRESS TO CONTINUE”

3.8 LEVEL 6 SELF-TEST - DISCRETE INPUT TEST

Level 6 Self-Test provides enunciation of any changes in the status of discrete inputs for verification proper function and discrete input wiring. Level 6 Self-Test is initiated by pressing the cockpit Self-Test button within 3 seconds of the end of Level 5 Self-Test. The results are indicated in the following sections.

If a state change occurs on any discrete input (other than the Self-Test input as it is directly tested in its use to control the test sequences), the EGPWC will annunciate the functional name of the discrete followed by its new state. For example, if the Glideslope Cancel discrete input in the current configuration is defined as ground = cancel, and the discrete transitions from open to ground, Level 6 Self-Test will say: “GLIDESLOPE CANCELED”. If the input is only momentarily grounded Level 6 Self-Test will say: “GLIDESLOPE CANCELED - GLIDESLOPE ENABLED.”

NOTE: Not all discretes are used in an installation; therefore, unused discretes shall not apply. See aircraft wiring diagrams to determine applicable discretes.

During Level 6 Self-Test the message “DISCRETE INPUT TEST - PRESS TO CANCEL” is enunciated every 60 seconds. This provides additional evidence; along with the continued illumination of the INOP lights/fail annunciations, that Self-Test is still in progress.

During Level 6 Self-Test, a Short Cancel or Long Cancel terminates Self-Test and “END OF SELF-TEST” is enunciated. As with all Self-Test levels, if the aircraft goes in air, then Self-Test is terminated.

CAGE CODE: 97896

SCALE: NONE SIZE: A DWG NO.: 060-4199-180

REV: G

SHEET 37 of 68

Page 36 Page 38
Page 37
Image 37
Honeywell MK XXII, MK VIII manual Level 5 SELF-TEST Alert History, Level 6 SELF-TEST Discrete Input Test
Page 36 Page 38

MK VIII, MK V, MK XXII, MK VII, MK VI specifications

Honeywell's range of control systems, particularly the MK VI, MK VIII, MK VII, V, and XXII, are pivotal innovations that have revolutionized process automation and control in various industries, especially in power generation and oil and gas sectors. Each of these systems comes with unique features and technologies to enhance operational efficiency, safety, and reliability.

The Honeywell MK VI control system is renowned for its ability to provide effective plant control and management tools, featuring advanced operator interfaces and robust hardware components. It employs a modular design, which allows for easy scalability and integration into existing infrastructure. The MK VI is equipped with Ethernet-based communication protocols, ensuring high-speed data transfer and enabling seamless connectivity with other systems.

The MK VIII system takes automation a step further, emphasizing enhanced performance and reliability. With its built-in redundancy and advanced diagnostics, the MK VIII minimizes downtime and optimizes maintenance efforts. Its powerful software tools are designed to improve operator decision-making, providing critical insights into plant operations and trends.

Honeywell’s MK VII control system is designed for high-performance applications, especially in gas turbine environments. It features advanced control algorithms, enabling precise control of emissions and improving overall efficiency. The MK VII stands out with its ability to maintain optimal performance under varying load conditions, ensuring reliability in challenging operational scenarios.

The MK V system is one of Honeywell's legacy products, known for its simple and user-friendly interface. Despite its age, it continues to be a dependable choice for many plants. It offers solid performance with basic control functions and has been a reliable backbone for older facilities transitioning into newer technologies.

Lastly, the MK XXII brings a modern twist to control systems with its focus on cybersecurity and data analytics. This system takes advantage of big data and IoT technologies, providing enhanced visibility of operations through real-time monitoring and predictive maintenance capabilities. The MK XXII ensures that plants not only operate efficiently but also mitigate risks associated with cyber threats.

Overall, Honeywell's series of control systems showcases their commitment to innovation and reliability in process automation, catering to the diverse needs of contemporary industrial environments. Each system is designed with specific features and capabilities that address the evolving challenges of process control, ensuring that users can achieve optimal performance and safety in their operations.
Top Page Image Contents