EGPWS LINE MAINTENANCE MANUAL

Installations that do not have the windshear function or the function enabled will not enunciate the windshear message and illuminate windshear alert lights. Similarly, installations without the Terrain Alerting and Display (TAD) function enabled will not have terrain lights and display or “TERRAIN” aural enunciation.

•NOTE: The general sequence of the LEVEL 1 SELF-TEST is the same for all installations. The actual aural message and nomenclature of the Alert/warning lamps will vary.

•NOTE: Ensure that none of the RAAS maintenance messages or RAAS On-Ground (display) status messages listed in Appendix C of this document is enunciated during the Level 1 Self-Test or terrain display range changes (respectively) unless RAAS is activated for your aircraft. See the applicable aircraft AFMS and/or Instructions for Continued Airworthiness (ICAW) documentation to determine if RAAS is activated.

•NOTE: An enunciation of “GPS NOT NAVIGATING” during the Level 1 Self-Test indicates that the Internal P- xPress GPS engine has not acquired sufficient satellites to navigate. If this message is enunciated, ensure the aircraft is in full view of the constellation for at least 20 minutes. If this does not resolve the enunciation, verify all interfaces of the coax cable from the antenna to the EGPWC.

3.3.3 LONG LEVEL 1 SELF-TEST

The Long Level 1 Self-Test is initiated by pressing and holding Self-Test until Self-Test voices start. The Long Level 1 Self-Test enunciates all configured and activated alert voices, including warning voices, caution voices, and altitude callout voices immediately following the Short Level 1 Self-Test sequence above.

3.4 LEVEL 2 SELF-TEST - CURRENT FAULTS

Level 2 Self-Test provides enunciation of all faults existing at the time of the test request. Level 2 Self-Test is initiated by pressing Self-Test within 3 seconds of the end of Level 1 Self-Test or following a short cancel during Level 1 Self-Test.

If a fault is detected, it will be classified as either an internal or an external fault. Internal faults are defined as those faults that originate within the EGPWC. Internal faults will turn on the red “COMPUTER FAIL” LED on the EGPWC front panel. External faults are defined as those faults that originate from sources outside the EGPWC. External faults will turn on the amber “EXTERNAL FAULT” LED on the EGPWC front panel.

Note that for the EGPWS/GNSSU (-060 MK V/VII), both internal and external fault lights will be lit if there is a problem with the integral GNSSU subsystem.

If the EGPWC is connected to a GPS or GNSSU for position information (internal or external), various navigation data status messages may also be listed during Level 2 Self Test. These messages indicate that there is a problem with the position data, caused by antenna problems, satellite visibility or multi-path errors.

*Useful Tip #2 – Pressing the GPWS test switch for more than 2 seconds during Level 2 through 5 will bypass the test information and will immediately jump to the end of that level (“PRESS TO CONTINUE” voice). GPWS INOP, Windshear INOP, and Terrain INOP (or Terrain Not Available) lights are turned on (or remain on) for the duration of the Level 2 Self-Test.

CAGE CODE: 97896

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

REV: G

SHEET 26 of 68

Page 25 Page 27
Page 26
Image 26
Honeywell MK VIII, MK XXII manual Long Level 1 SELF-TEST, Level 2 SELF-TEST Current Faults
Page 25 Page 27

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