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• when deselected by the flight crew.
4 Ground Proximity Terrain Override (TERR OVRD)
1 Ground Proximity Glideslope Inhibit (G/S INHIBIT)
AFT AISLE STAND PANEL
G/S
INHIBIT CANCEL
AURAL
IDENT
MODE
TRANSPONDER
ALT
RPTG OFF
STBY
TA ONLY
TA/RA
XPDR
PRELIMINARY
1 BELOW
G/S
787 Flight Crew Operations Manual
Warning Systems -
Controls and Indicators
Boeing Proprietary 15.10.15
GPWS Look-Ahead Terrain Alerting Display and
Annunciations
GPWS Terrain Display Selection
Push –
• selection applied to both the navigation display and the PFD mini-map
• TERR displayed in cyan on the left center of navigation display and
mini-map
• terrain data displayed in MAP or MAP CTR modes
• deselects weather radar display regardless of switch position
Second push – deselects terrain map display.
Selected –
• selection applied to navigation display only
• TERR displayed in cyan on the left center of display
• terrain data displayed in MAP or MAP CTR modes
• replaces weather radar display.
Unselected – deselects terrain data display.
1 Terrain (TERR) Map Switch
2 Terrain (TERR) Map Menu Selection
2
PRELIMINARY
NAVIGATION DISPLAY
EFIS CONTROL PANEL
1
787 Flight Crew Operations Manual
Warning Systems -
Controls and Indicators
15.10.16 Boeing Proprietary
Terrain Display
When the airplane is higher than 2,000 feet above terrain, density based on
obstacle height, peaks height, and airplane altitude:
• solid green – highest obstacles or peaks displayed
• high density green – intermediate height obstacles or terrain peaks
displayed
• low density green – lowest obstacles or terrain peaks displayed
When the airplane is lower than 2,000 feet above terrain, color and density based
on obstacle height, terrain height, and airplane altitude:
• low density dotted green – terrain from 2,000 feet below to 1000 feet
below airplane altitude
• high density dotted green – terrain from 1,000 feet below to 500 feet (250
feet with gear down) below airplane altitude
1 Terrain Display
NAVIGATION DISPLAY
1
5
PRELIMINARY
3
2
4
105
025
787 Flight Crew Operations Manual
Warning Systems -
Controls and Indicators
Boeing Proprietary 15.10.17
• low density dotted amber – terrain 500 feet (250 feet with gear down)
below to 1,000 feet above airplane altitude
• high density dotted amber – terrain 1000 feet to 2,000 feet above airplane
altitude
• dotted red – terrain more than 2,000 feet above airplane altitude
• dotted magenta – no terrain data available
• solid amber – look-ahead terrain caution alert is occurring
• solid red – look-ahead terrain warning alert is occurring
Note: In areas without terrain data, look-ahead terrain alerting and display
functions not available. GPWS immediate alerts function normally.
Displayed automatically when:
• a look-ahead terrain alert occurs, and
• TERR not selected on either ND, and
• respective ND is in MAP or MAP CTR mode.
Display updates with a display sweep similar to weather radar display.
TERR (cyan) – Terrain display enabled.
Color (amber, green, or red) same as color of corresponding obstacle or terrain
displayed.
Color (amber, green, or red) same as color of corresponding obstacle or terrain
displayed.
OBSTACLE (amber) – obstacle caution alert is occurring.
OBSTACLE (red) – obstacle warning alert is occurring.
TERRAIN (amber) – look-ahead terrain caution alert is occurring.
TERRAIN (red) – look-ahead terrain warning alert is occurring.
Displayed in all navigation display modes.
2 Terrain Mode Annunciation
3 Highest Elevation of Obstacle or Terrain Displayed
4 Lowest Elevation of Obstacle or Terrain Displayed
5 OBSTACLE and TERRAIN Annunciation
787 Flight Crew Operations Manual
Warning Systems -
Controls and Indicators
15.10.18 Boeing Proprietary
Terrain Navigation Display Annunciations
TERR FAIL (amber) – Look-ahead terrain alerting and display failed.
TERR OVRD (amber) – TERR OVRD selected from the GPWS page of the TCP.
TERR POS (amber) – Look-ahead terrain alerting and display unavailable due to
GPS position uncertainty. During time between GPS position failure and display
of TERR POS message, IRS provides position for look-ahead terrain alerting and
　
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