Windshear caution, Steep approach discrete, System configuration status – Honeywell MK VI User Manual

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MK VI MK VIII EGPWS Installation Design Guide

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7.4.11 Windshear Caution

The MK VIII EGPWC Windshear Cautions can be configured to activate any of the discrete outputs. Depending on
configuration, the Caution discrete will typically drive its own output lamp or provide a discrete output to other aircraft
systems.

7.4.12 Steep Approach Discrete

The Steep Approach discrete is active whenever Steep Approach has been selected via the pilot (or an Envelope
Modulation steep approach case is active) and is typically used to drive a lamp in the Steep Approach switch. For standard
steep approach selection method (alternate action switch) this discrete is not provided as the switch must be self lighting.
For Discrete I/O category IDs that supply a momentary Steep Approach Switch this lamp driver output is provided to light
the switch.

7.5 System Configuration Status

The EGPWC indicates the current hardware, software, databases, Category states and input discretes detected by the system.
Each configuration item has an associated configuration message. This is the message that will be read out during Present
Status on the RS-232 interface or voice output during Self Test Level 3 to inform the user of the current configuration.

TABLE 7.5-1: CONFIGURATION OPTIONS AND MESSAGES

Selected Option/Condition

Configuration Message

Category 4 (Smart Callout Selected)

SMART CALLOUT SELECTED

Category 6 (TA&D Disable)

TERRAIN AWARENESS DISABLED
TERRAIN CLEARANCE FLOOR DISABLED

Category 7 (Flap Reversal Select)

FLAP WOW REVERSAL SELECTED

Category 7 (Bank Angle Enable)

BANK ANGLE SELECTED

Category 7 (TA&D Alternate Pop Up)

ALTERNATE POP UP SELECTED

Category 7 (Obstacle Awareness Enabled)

OBSTACLE AWARENESS ENABLED

Category 7 (Peaks Mode Enabled)

PEAKS MODE ENABLED

Category 7 (WGS84 Reference Selected)

GPS ALTITUDE REFERENCE WGS 84 SELECTED

Category 7 (MSL Reference Selected)

GPS ALTITUDE REFERENCE MSL SELECTED

Category 7 (Steep Approach Enabled)

STEEP APPROACH ENABLED

Alternate Action Steep Approach Discrete #2 input discrete
activated

STEEP APPROACH SELECTED

Category 7 (Steep Approach Enabled) AND Alternate Action
Steep Approach Discrete #2 input discrete activated

STEEP APPROACH ACTIVATED

Category 7 (Steep Approach Enabled) AND Momentary Steep
Approach switch configured and Steep Approach (latch)
activated

STEEP APPROACH ACTIVATED

Glideslope Inhibit input discrete activated

GLIDESLOPE INHIBITED

Mode 6 Volume Control Discrete Selected

MODE 6 LOW VOLUME SELECTED

GND Audio Suppress (Inhibit)/All Modes Inhibit Discrete
Selected OR +28 V Audio Suppress (Inhibit)/All Modes Inhibit
Discrete Selected

EXTERNAL EGPWS INHIBITED
Note: Will only occur for present status as this condition
inhibits self tests

Terrain Awareness & TCF Inhibit input discrete activated

TERRAIN AWARENESS AND TCF DISABLED

GPWS Inhibit input discrete activated

GPWS INHIBITED
Note: Will only occur for present status as this condition
inhibits self tests

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