060-4314-000 • Rev. C - May 2004
44 MK VI & MK VIII EGPWS Pilot Guide
Options
continued
• TAD Alternate Pop Up – If TRUE, disables automatic terrain
display when TAD or Obstacle alert is active.
• Smart “500” Callout – Available in certain Altitude Callout
options for “Five Hundred” called out at 500 feet Radio Alti
-
tude during non-precision approaches.
• Bank Angle Enable – Enables Bank Angle alerts.
• Audio Voice Menu – Selects the voice (phrase) that is used
for audio alerts.
• Peaks Enable – Enables Peaks display mode with elevation
numbers and alternate density pattern.
• Steep Approach Enable – Enables Steep Approach (Mode 1
Excessive Descent Rate) alert biasing.
• Flap Reversal – Reverses landing flap input discrete logic.
• GPS Altitude Reference – Defines the GPS Altitude input as
referenced to WGS-84 or MSL.
• Lamp Format – One of two lamp formats are available.
Lamp Format 1 specifies only Mode 5 glideslope alerts
activate the caution (amber) lamp output. All other alerts
activate the warning (red) lamp output
Lamp Format 2 specifies all "Pull-Up" warning alerts ac-
tivate the warning (red) lamp output. All caution alerts
activate the caution (amber) lamp output (FAA requirement
for new installations)
NOTE: Mode 6 advisories do not activate any lamp output.
Additional input/output discretes are used to control or define
EGPWS operations:
• Glideslope Inhibit – Inhibits Mode 5 Glideslope alerting.
Normally used for backcourse approaches.
• Mode 6 Low Volume – Selects reduced Mode 6 volume
(-6db). This is sometimes connected to a Windshield Wiper
system to increase EGPWS audio while wipers are operating
• Audio Inhibit – disables all EGPWS audio outputs.
• Steep Approach Select – Selects (activates) Steep Approach
(Mode 1 Excessive Descent Rate) alert biasing to reduce nui
-
sance alerts when Steep Approach Enable is true.
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