Honeywell MK VIII, MK XXII manual Excessive Bank Angle Callout, Tail Strike Callout

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EGPWS LINE MAINTENANCE MANUAL

2.2.6.1 EXCESSIVE BANK ANGLE CALLOUT

The Bank Angle Callout feature provides callout enunciation for excessive bank angles based on altitude and bank angle limits defined by aircraft type. It is intended to enhance situational awareness during intentional or unintentional maneuvering, and for protection against wing or engine strikes when close to the runway.

When the bank angle limit is reached, the aural callout “BANK ANGLE, BANK ANGLE” is given. Follow-on aural messages are only provided when the aircraft roll angle increases an additional 20% from the previous callout. Bank Angle Callouts are enabled by the installation configuration.

2.2.6.2 TAIL STRIKE CALLOUT

A tail strike alert function is provided by the MK XXII for applicable rotary wing aircraft based upon Radio Altitude, Pitch Attitude, Pitch Rate and Barometric Altitude Rate. The voice message “Tail Too Low “ is provided continuously while within the alert boundary. Unique alert boundaries are provided for applicable aircraft types.

2.2.7 MODE 7 - WINDSHEAR DETECTION (OPTIONAL FOR MK V/VII ONLY)

Mode 7 provides the flight crew with visual and aural alerts for windshear of sufficient magnitude to be potentially hazardous to the aircraft. The system is capable of detecting severe decreasing performance shears (i.e. increasing tailwind/decreasing headwind and/or downdraft) which present an immediate danger to the aircraft. The system is also capable of detecting severe increasing performance shears (increasing headwind/decreasing tailwind and/or up draft). While these shears may not present an immediate danger to the aircraft, these shears can indicate that the atmospheric instability is such that an encounter with a severe decreasing performance shear is likely.

A detected increasing performance shear will result in an aural “CAUTION WINDSHEAR” enunciation and cockpit light annunciation when enabled. A detected decreasing performance shear will result in an aural siren followed by “WINDSHEAR, WINDSHEAR, WINDSHEAR” with a corresponding cockpit warning light annunciation.

2.2.8 ENVELOPE MODULATION (NOT AVAILABLE IN MK VI/VIII -001)

Envelope Modulation provides improved alert protection and expanded alerting margins at identified key locations throughout the world. Due to terrain features at or near certain specific airports, normal operations have resulted in nuisance or missed alerts at these locations in the past. With the introduction of accurate position information and a terrain and airport database, it is now possible to identify these areas and adjust the normal alerting process to compensate for the condition.

Modes 4, 5, and 6 are expanded at certain locations to provide alerting protection consistent with normal approaches. Modes 1, 2, and 4 are desensitized at other locations to prevent nuisance alerts that result from unusual terrain or approach procedures. In all cases, very specific information is used to correlate the aircraft position and phase of flight prior to modulating the envelopes. This function is automatic and transparent to crew operation.

2.2.9 TERRAIN CLEARANCE FLOOR AND RUNWAY FIELD CLEARANCE FLOOR

The Terrain Clearance Floor (TCF) alerting function adds an additional element of protection to the standard Ground Proximity Warning System for fixed-wing aircraft. It creates an increasing terrain clearance envelope around the airport runway to provide CFIT protection against situations where Mode 4 provides limited or no protection. TCF alerts are based on current aircraft location, destination runway center point position, and Radio Altitude (altitude AGL). TCF is active during takeoff, cruise, and final approach. TCF complements the existing Mode 4 protection by providing an alert based on insufficient terrain clearance even when in landing configuration.

The TCF function is enhanced in all fixed-wing models (beginning with release –210-210 for the MK V/VII) with the addition of a Runway Field Clearance Floor (RFCF) alerting function. RFCF is based on current aircraft location, destination runway center point position, and Geometric Altitude or altitude Above Sea Level (ASL) relative to the destination runway. RFCF provides short landing protection for runways that are significantly higher than the surrounding terrain.

CAGE CODE: 97896

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

REV: G

SHEET 14 of 68

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Contents Egpws Line Maintenance Manual Drawn Date RevisionsDescription 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 SystemMode 3 Descent After Takeoff Operation Mode 1 Excessive Descent RateMode 2A/2B Terrain Closure Rate Mode 4A/4B/4C Unsafe Terrain ClearanceCallout Description Mode 5 Descent below GlideslopeMode 6 Advisory Callouts Optional Smart Five Hundred Tail Strike Callout Mode 7 Windshear Detection Optional for MK V/VII onlyExcessive Bank Angle 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 Egpws Status LED’S Front Panel Test ConnectorEgpwc Front Panel 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 PreambleGpws Inhibited Short Level 1 SELF-TESTGpws INHIBITED, Terrain Inhibited SELF-TEST InhibitedLevel 2 SELF-TEST Current Faults Long Level 1 SELF-TESTCurrent Faults Internal Current Faults ExternalFault Example Reason Flap Switch Fault Bussignal FaultBUS Wiring Fault Gear Switch FaultCallouts Option Invalid Program PIN Read ErrorSystem or Mode Tasked Failed Audio Menu InvalidSheet 31 Terrain Awareness no Valid Latitude Terrain AWARENESS-POSITION ErrorTerrain Clearance Floor Position Error 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 DiscreteSteep Approach Discretes Flap Position DiscretesSELF-TEST Discrete Steep Approach Discrete #1 MK V and MK VII only10 +28V ILS Tuned Discrete Steep Approach Discrete #2GND ILS Tuned Discrete Glideslope Validity Discretes13 +28 V Glideslope Inhibit Discrete GND Glideslope Cancel DiscreteGND Glideslope Inhibit Discrete Decision Height DiscreteGND Audio SUPPRESSINHIBIT/ALL Modes Inhibit Discrete Mode 6 Volume Control DiscreteCallouts Enable Discrete MK V and MK VII only 19 +28 V Audio SUPPRESSINHIBIT/ALL Modes Inhibit DiscreteTerrain Awareness & TCF Inhibit AOA Validity Discretes MK V and MK VII onlyDisplay Select Discretes Simulator Reposition MK V and MK VII onlyAttitude Validity Discretes Weather Radar ON/OFFLocalizer Validity Discretes MK V and MK VII only Airspeed Validity DiscreteLongitudinal Acceleration Validity Discrete Barometric Altitude Rate Validity DiscretesAcceleration SELF-TEST in Progress Discrete Normal Acceleration Validity DiscreteAOA Vane Heater Discrete PLI Deselect Switch Discretes MK V and MK VII onlyMagnetic Heading Validity Discrete Autopilot Disconnect DiscretesCorrected Barometric Altitude Validity Discrete Tactical Select DiscreteAltitude Alert Discrete Momentary Flap Override DiscreteGpws Inhibit Discrete Weight on Wheels DiscreteRaas Enable Discrete MK V and MK VII only Raas Inhibit Discrete MK V and MK VII onlyLOW Airspeed Monitor Inhibit Discrete MK V 737NG only Database Update Frequency Maintenance Practices GeneralDatabase Update 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 Configuration Module MK VI, MK VIII, and MK Xxii only REMOVAL/INSTALLATION 6.1 Egpwc RemovalInstallation 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

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