Honeywell MK XXII, MK V Terrain Awareness no Valid Latitude, Terrain Awareness no Valid Longitude

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EGPWS LINE MAINTENANCE MANUAL

NOTE: Before attempting to correct an external fault, verify that the EGPWS installation configuration matches the aircraft configuration. If the installation configuration and aircraft configuration does not match, check the Program Pin or Configuration Module connections being sure to cycle power to the EGPWC in the process. If an incorrect aircraft configuration exists, the Program Pins must be changed or the Configuration Module may need to be reprogrammed (see Maintenance Practices) or replaced (see Removal/Installation section).

If the unit is a MK V or MK VII with integral GNSSU (-060 part number), and external faults are indicated on GPS signals (e.g., GPS BUS 1 LATITUDE FAULT), an internal fault may exist. In this case both fault lights will be on and the message INTERNAL GPS FAULT will also be indicated. This condition can also be caused by a disconnected or broken antenna wire. Ensure good antenna connection before replacing the EGPWS/GNSSU.

If no faults are detected, the following messages will be enunciated:

“CURRENT FAULTS” “NO FAULTS” “PRESS TO CONTINUE”

If no faults are detected, but the GPS or GNSSU are not navigating properly, navigation status messages may be enunciated as follows:

“CURRENT FAULTS” “NO FAULTS”

Navigation Status Messages “PRESS TO CONTINUE”

The list of possible navigation problems is listed in Table 3–6. In these instances, no fault lamps will be lit on the unit, however, TERRAIN INOP or TERRAIN UNAVAILABLE will be indicated on the Flight Deck.

TABLE 3-6: LEVEL 2 SELF-TEST – NAVIGATION STATUS MESSAGES

THE FOLLOWING GPS STATUS MESSAGES ARE AVAILABLE IN LEVEL 2 SELF-TEST:

Enunciation:

Probable Cause:

Action:

Enunciation:

Probable Cause:

Action:

Enunciation:

Probable Cause:

Action:

Description:

Probable Cause:

Action:

Enunciation:

Probable Cause:

Action:

“TERRAIN AWARENESS NO VALID LATITUDE”

GPS/GNSSU has not acquired a sufficient number of satellites.

Remove aircraft from hanger and wait 5 to 20 minutes for the GPS/GNSSU acquire a sufficient number of satellites. Verify cabling and antenna connection for the GPS/GNSSU.

“TERRAIN AWARENESS NO VALID LONGITUDE”

GPS/GNSSU has not acquired a sufficient number of satellites.

Remove aircraft from hanger and wait 5 to 20 minutes for the GPS/GNSSU acquire a sufficient number of satellites. Verify cabling and antenna connection for the GPS/GNSSU.

“TERRAIN INOP”

GPS/GNSSU has not acquired a sufficient number of satellites.

Remove aircraft from hanger and wait 5 to 20 minutes for the GPS/GNSSU to acquire sufficient number of satellites. Verify cabling and antenna connection for the GPS/GNSSU.

“TERRAIN AWARENESS-POSITION ERROR”

GPS/GNSSU has not acquired a sufficient number of satellites or ARINC [743A / 743] setting incorrect.

Remove aircraft from hanger and wait 5 to 20 minutes for the GPS/GNSSU to acquire sufficient number of satellites. Verify cabling and antenna connection for the GPS/GNSSU. Verify correct 743A / 743 configuration.

“TERRAIN CLEARANCE FLOOR POSITION ERROR”

GPS/GNSSU has not acquired a sufficient number of satellites or ARINC [743A / 743] setting incorrect.

Remove aircraft from hanger and wait 5 to 20 minutes for the GPS/GNSSU to acquire sufficient number of satellites. Verify cabling and antenna connection for the GPS/GNSSU. Verify correct 743A / 743 configuration.

CAGE CODE: 97896

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

REV: G

SHEET 32 of 68

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Contents Egpws Line Maintenance Manual Drawn Revisions DescriptionDate ApprovedEFF PT 14A Disp USE Table of Contents Maintenance Practices 10.1 MK V Egpwc Part Numbers MK VII Egpwc Part Numbers Introduction ScopeApplicability Reference Documents MK VI, MK VIII, MKDescription and Operation General System Description Enhanced Ground Proximity Warning SystemOperation Mode 1 Excessive Descent Rate Mode 2A/2B Terrain Closure RateMode 3 Descent After Takeoff Mode 4A/4B/4C Unsafe Terrain ClearanceCallout Description Mode 5 Descent below GlideslopeMode 6 Advisory Callouts Optional Smart Five Hundred Mode 7 Windshear Detection Optional for MK V/VII only Excessive Bank Angle CalloutTail Strike Callout Envelope Modulation not Available in MK VI/VIIITerrain and Obstacle Database Runway DatabaseTerrain Alerting and Display Optional Weather Radar Autotilt MK V and MK VII only Peaks Display Mode OptionalGeometric Altitude GPS Required Altimeter Monitor Option for MK V and MK VII only System Display and AnnunciationStabilized Approach Monitor Option for MK V and MK VII only Long Landing Monitor Option for MK V and MK VII only LOW Airspeed Monitor MK V Boeing 737NG onlyBelow Lamp FormatBIT Description System Maintenance Maintenance PhilosophySystem Operation During AN Inop Condition Front Panel Test Connector Egpwc Front PanelEgpws Status LED’S Front Panel SELF-TEST Interface MK V and MK VII onlySELF-TEST Functions External Computer Fault Fail Corrective Action Fault Isolation Troubleshooting GeneralTroubleshooting Guide Level 1 SELF-TEST GO/NO GO Test SELF-TEST PreambleShort Level 1 SELF-TEST Gpws INHIBITED, Terrain InhibitedGpws Inhibited SELF-TEST InhibitedLevel 2 SELF-TEST Current Faults Long Level 1 SELF-TESTCurrent Faults Internal Current Faults ExternalFault Example Reason Bussignal Fault BUS Wiring FaultFlap Switch Fault Gear Switch FaultProgram PIN Read Error System or Mode Tasked FailedCallouts Option Invalid Audio Menu InvalidSheet 31 Terrain AWARENESS-POSITION Error Terrain Clearance Floor Position ErrorTerrain Awareness no Valid Latitude Terrain Awareness no Valid LongitudeLevel 3 SELF-TEST System Configuration Following Information is Given in the Level 3 SELF-TESTIRS 1 Attitude Mode Selected Egpws Line Maintenance Manual Level 4 SELF-TEST Fault History Following Information is Given in the Level 4 SELF-TESTFollowing Information is Given in the Level 5 SELF-TEST Level 5 SELF-TEST Alert HistoryLevel 6 SELF-TEST Discrete Input Test 3 +28V Landing Gear Discrete Arinc 552 / ALT 55 Radio Altitude Validity Flag DiscretesGND Landing Gear Discrete GND Landing Flap Discrete or Flap Override 5 +28V Landing Flap or Flap Override DiscreteFlap Position Discretes SELF-TEST DiscreteSteep Approach Discretes Steep Approach Discrete #1 MK V and MK VII onlySteep Approach Discrete #2 GND ILS Tuned Discrete10 +28V ILS Tuned Discrete Glideslope Validity DiscretesGND Glideslope Cancel Discrete GND Glideslope Inhibit Discrete13 +28 V Glideslope Inhibit Discrete Decision Height DiscreteMode 6 Volume Control Discrete Callouts Enable Discrete MK V and MK VII onlyGND Audio SUPPRESSINHIBIT/ALL Modes Inhibit Discrete 19 +28 V Audio SUPPRESSINHIBIT/ALL Modes Inhibit DiscreteAOA Validity Discretes MK V and MK VII only Display Select DiscretesTerrain Awareness & TCF Inhibit Simulator Reposition MK V and MK VII onlyWeather Radar ON/OFF Localizer Validity Discretes MK V and MK VII onlyAttitude Validity Discretes Airspeed Validity DiscreteBarometric Altitude Rate Validity Discretes Acceleration SELF-TEST in Progress DiscreteLongitudinal Acceleration Validity Discrete Normal Acceleration Validity DiscretePLI Deselect Switch Discretes MK V and MK VII only Magnetic Heading Validity DiscreteAOA Vane Heater Discrete Autopilot Disconnect DiscretesTactical Select Discrete Altitude Alert DiscreteCorrected Barometric Altitude Validity Discrete Momentary Flap Override DiscreteWeight on Wheels Discrete Raas Enable Discrete MK V and MK VII onlyGpws Inhibit Discrete Raas Inhibit Discrete MK V and MK VII onlyLOW Airspeed Monitor Inhibit Discrete MK V 737NG only Maintenance Practices General Database UpdateDatabase Update Frequency Loading a DatabaseObtaining AN Egpws Flight History Download Card Download ProcedureFlight History Downloading Transcription of the Pcmcia Card Via email aerotechsupport@honeywell.comSheet 54 CFG CAT 7 92 T CUW command/data string REMOVAL/INSTALLATION 6.1 Egpwc Removal InstallationConfiguration Module MK VI, MK VIII, and MK Xxii only Servicing GeneralEgpws Ground Tests Display Switching Relays if InstalledADJUSTMENT/TEST Adjustment Repairs General CLEANING/PAINTING GeneralINSPECTION/CHECK General Appendix a Winviews Appendix B Troubleshooting DO’S and do NOT’S Appendix C Raas Maintenance Messages Aural & Displayed Maint Function MessageMaint Function Displayed Message RAAS-NA-xxxx amber RAAS-RTO green RAAS-INOP amberAppendix D Stabilized Approach Monitor Maintenance Messages Self-Test Level 3 RCD Part NumberAppendix E Altimeter Monitor Maintenance Messages Self-Test Level 1 Flaps Monitor Inop Appendix G Long Landing Monitor Maintenance Messages Appendix H LOW Airspeed Monitor Maintenance Messages Self-Test Level 3 Airspeed Low Inhibited Annunciated at

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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