Honeywell MK VIII, MK XXII Egpwc Front Panel, Egpws Status LED’S, Audio Jack MK V and MK VII only

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EGPWS LINE MAINTENANCE MANUAL

These tests primarily consist of more thorough hardware checks that would disrupt normal operation if continuously run.

2.3.4 EGPWC FRONT PANEL

To aid in troubleshooting the EGPWS, the front panel of the Warning Computer provides indicators and user interfaces as follows.

2.3.4.1 EGPWS STATUS LED’S

Three LED’s on the EGPWC front panel provide a high level indication of overall system status. These are:

•a yellow “External Fault” LED

•a green “Computer OK” LED

•a red “Computer Fail” LED

The yellow “External Fault” LED indicates that a fault external to the EGPWC exists. The green “Computer OK” LED indicates that the EGPWC is operating correctly with no internal faults. The red “Computer Fail” LED indicates that the EGPWC has an internal fault. Further explanation of internal and external faults is given in Section 3.4.1 and Section 3.4.2.

*Useful Tip #1 – The red Computer Fail LED illuminated does not guarantee the EGPWS is failed. It is possible for invalid strapping/wiring (MK V/VII only) to cause the LED to illuminate. Before returning a MK V/VII for repair, bench test the unit with power/ground applied, making sure to ground the parity pin. If the red Computer Fail LED does not illuminate during this bench test, the aircraft wiring is causing the Computer Fail condition.

2.3.4.2 FRONT PANEL SELF-TEST INTERFACE (MK V AND MK VII ONLY)

The EGPWC front panel provides a Self-Test switch for activating Self-Test features described in Section 2.3.5. This switch functions the same as cockpit Self-Test switches.

2.3.4.3 AUDIO JACK (MK V AND MK VII ONLY)

The EGPWC front panel provides a headphone jack for use during Self-Test. The audio jack is a standard 600Ω monophonic audio output compatible with a standard 2-connector ¼" audio plug headphones.

2.3.4.4 FRONT PANEL PCMCIA INTERFACE

For the MK V and MK VII, a PCMCIA card slot is provided in the front panel. For the MK VI, MK VIII, and MK XXII the PCMCIA interface utilizes an external PCMCIA interface called a “SmartCable” connected to the front panel Test Connector.

The PCMCIA interface provides a data downloading capability (either loading a new database from a PCMCIA Card or downloading history data from the EGPWC to a Fault History Card).

2.3.4.5 FRONT PANEL TEST CONNECTOR

The EGPWC front panel Test Connector provides communications support capabilities intended for maintenance and test functions. For the MK V and MK VII, this includes RS-232 and 422 communications. For the MK VI, MK VIII, and MK XXII this includes RS-232, power, and signals used for PCMCIA (SmartCable) operation. These serve as access to EGPWS signal monitoring, flight history, initiating BITE tests, updating databases, and other functions. The interface is full duplex and is intended for human interaction using custom interface programs such as the Honeywell WinVIEWS© utility (see Appendix A).

CAGE CODE: 97896

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

REV: G

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Contents Egpws Line Maintenance Manual Drawn Description RevisionsDate ApprovedEFF PT 14A Disp USE Table of Contents Maintenance Practices 10.1 Introduction Scope ApplicabilityMK V Egpwc Part Numbers MK VII Egpwc Part Numbers MK VI, MK VIII, MK Reference DocumentsEnhanced Ground Proximity Warning System Description and Operation General System DescriptionMode 2A/2B Terrain Closure Rate Operation Mode 1 Excessive Descent RateMode 3 Descent After Takeoff Mode 4A/4B/4C Unsafe Terrain ClearanceMode 5 Descent below Glideslope Mode 6 Advisory Callouts OptionalCallout Description Smart Five Hundred Excessive Bank Angle Callout Mode 7 Windshear Detection Optional for MK V/VII onlyTail Strike Callout Envelope Modulation not Available in MK VI/VIIIRunway Database Terrain Alerting and Display OptionalTerrain and Obstacle Database Peaks Display Mode Optional Geometric Altitude GPS RequiredWeather Radar Autotilt MK V and MK VII only System Display and Annunciation Stabilized Approach Monitor Option for MK V and MK VII onlyAltimeter Monitor Option for MK V and MK VII only LOW Airspeed Monitor MK V Boeing 737NG only Long Landing Monitor Option for MK V and MK VII onlyLamp Format BelowSystem Maintenance Maintenance Philosophy System Operation During AN Inop ConditionBIT Description Egpwc Front Panel Front Panel Test ConnectorEgpws Status LED’S Front Panel SELF-TEST Interface MK V and MK VII onlySELF-TEST Functions Fault Isolation Troubleshooting General Troubleshooting GuideExternal Computer Fault Fail Corrective Action SELF-TEST Preamble Level 1 SELF-TEST GO/NO GO TestGpws INHIBITED, Terrain Inhibited Short Level 1 SELF-TESTGpws Inhibited SELF-TEST InhibitedLong Level 1 SELF-TEST Level 2 SELF-TEST Current FaultsCurrent Faults External Current Faults InternalFault Example Reason BUS Wiring Fault Bussignal FaultFlap Switch Fault Gear Switch FaultSystem or Mode Tasked Failed Program PIN Read ErrorCallouts Option Invalid Audio Menu InvalidSheet 31 Terrain Clearance Floor Position Error Terrain AWARENESS-POSITION ErrorTerrain Awareness no Valid Latitude Terrain Awareness no Valid LongitudeFollowing Information is Given in the Level 3 SELF-TEST Level 3 SELF-TEST System ConfigurationIRS 1 Attitude Mode Selected Egpws Line Maintenance Manual Following Information is Given in the Level 4 SELF-TEST Level 4 SELF-TEST Fault HistoryLevel 5 SELF-TEST Alert History Level 6 SELF-TEST Discrete Input TestFollowing Information is Given in the Level 5 SELF-TEST Arinc 552 / ALT 55 Radio Altitude Validity Flag Discretes GND Landing Gear Discrete3 +28V Landing Gear Discrete 5 +28V Landing Flap or Flap Override Discrete GND Landing Flap Discrete or Flap OverrideSELF-TEST Discrete Flap Position DiscretesSteep Approach Discretes Steep Approach Discrete #1 MK V and MK VII onlyGND ILS Tuned Discrete Steep Approach Discrete #210 +28V ILS Tuned Discrete Glideslope Validity DiscretesGND Glideslope Inhibit Discrete GND Glideslope Cancel Discrete13 +28 V Glideslope Inhibit Discrete Decision Height DiscreteCallouts Enable Discrete MK V and MK VII only Mode 6 Volume Control DiscreteGND Audio SUPPRESSINHIBIT/ALL Modes Inhibit Discrete 19 +28 V Audio SUPPRESSINHIBIT/ALL Modes Inhibit DiscreteDisplay Select Discretes AOA Validity Discretes MK V and MK VII onlyTerrain Awareness & TCF Inhibit Simulator Reposition MK V and MK VII onlyLocalizer Validity Discretes MK V and MK VII only Weather Radar ON/OFFAttitude Validity Discretes Airspeed Validity DiscreteAcceleration SELF-TEST in Progress Discrete Barometric Altitude Rate Validity DiscretesLongitudinal Acceleration Validity Discrete Normal Acceleration Validity DiscreteMagnetic Heading Validity Discrete PLI Deselect Switch Discretes MK V and MK VII onlyAOA Vane Heater Discrete Autopilot Disconnect DiscretesAltitude Alert Discrete Tactical Select DiscreteCorrected Barometric Altitude Validity Discrete Momentary Flap Override DiscreteRaas Enable Discrete MK V and MK VII only Weight on Wheels DiscreteGpws Inhibit Discrete Raas Inhibit Discrete MK V and MK VII onlyLOW Airspeed Monitor Inhibit Discrete MK V 737NG only Database Update Maintenance Practices GeneralDatabase Update Frequency Loading a DatabaseDownload Procedure Flight History DownloadingObtaining AN Egpws Flight History Download Card Via email aerotechsupport@honeywell.com Transcription of the Pcmcia CardSheet 54 CFG CAT 7 92 T CUW command/data string Installation REMOVAL/INSTALLATION 6.1 Egpwc RemovalConfiguration Module MK VI, MK VIII, and MK Xxii only Servicing GeneralDisplay Switching Relays if Installed ADJUSTMENT/TEST AdjustmentEgpws Ground Tests CLEANING/PAINTING General INSPECTION/CHECK GeneralRepairs General Appendix a Winviews Appendix B Troubleshooting DO’S and do NOT’S Maint Function Message Appendix C Raas Maintenance Messages Aural & DisplayedRAAS-NA-xxxx amber RAAS-RTO green RAAS-INOP amber Maint Function Displayed MessageSelf-Test Level 3 RCD Part Number Appendix D Stabilized Approach Monitor Maintenance MessagesAppendix E Altimeter Monitor Maintenance Messages Self-Test Level 1 Flaps Monitor Inop Appendix G Long Landing Monitor Maintenance Messages Self-Test Level 3 Airspeed Low Inhibited Annunciated at Appendix H LOW Airspeed Monitor Maintenance Messages

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.
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