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• Windshear alerting with (solid) guidance cue displayed.
1 Angle-of-Attack (AOA) Limit Symbol
1
PRELIMINARY
787 Flight Crew Operations Manual
Flight Instruments, Displays -
Head-Up Display System -
Displays
10.12.22 Boeing Proprietary
Slip/Skid Indicators (SSI)
Referenced to and rotated with the roll scale pointer, or referenced to the unusual
attitude (UA) roll scale pointer (whichever is displayed).
Referenced to the flight path symbol. Only displayed during takeoff or low
altitude go-around to provide yaw reference in the event of engine failure.
1 Roll Scale Slip/Skid Indicator
2 Flight Path Slip/Skid Indicator
1
2
PRELIMINARY
787 Flight Crew Operations Manual
Flight Instruments, Displays -
Head-Up Display System -
Displays
Boeing Proprietary 10.12.23
Speed Error Tape and Flight Path Acceleration
Indicates the inertial acceleration (or deceleration) of the airplane along the flight
path.
Removed from the display when a low-level, decreasing performance windshear
is detected below 400 feet AGL.
When symbol is above the wing of the flight path symbol, the airplane is
accelerating. When it is below the flight path symbol wing, the airplane is
decelerating.
Displays difference between the indicated airspeed and the selected airspeed on
the Mode Control Panel.
Symbol not displayed until first flap retraction.
If the indicated airspeed is faster than the selected speed, the Speed Error Tape
rises above the wing. Likewise, if the airspeed is slower than the selected speed,
the Speed Error Tape falls below the wing.
1 Flight Path Acceleration symbol
2 Speed Error Tape
2
1
PRELIMINARY
787 Flight Crew Operations Manual
Flight Instruments, Displays -
Head-Up Display System -
Displays
10.12.24 Boeing Proprietary
TO/GA Reference Line
Displayed during takeoff roll if:
• Flight director TO/GA mode is active, and
• Ground speed is greater than 65 knots, or pitch command is greater than
10 degrees.
1 TO/GA Reference Line
1
PRELIMINARY
787 Flight Crew Operations Manual
Flight Instruments, Displays -
Head-Up Display System -
Displays
Boeing Proprietary 10.12.25
Ground Deceleration Scale
Vertical position of symbol along ground deceleration scale indicates the actual
inertial deceleration rate of the airplane.
Vertical indexed scale and pointer indicate the actual deceleration rate being
achieved, as provided by the corresponding autobrake setting (1, 2, 3, 4, MAX
AUTO).
Displayed on landing. Also displayed on takeoff if a deceleration is sensed with
the groundspeed above 50 knots, and airplane is still on ground.
Once displayed, it is removed when:
• groundspeed decreases below 25 knots, or
• airplane begins accelerating, or
• airplane lifts off.
1 Flight Path Acceleration symbol
2 Ground Deceleration Scale
1 2
PRELIMINARY
787 Flight Crew Operations Manual
Flight Instruments, Displays -
Head-Up Display System -
Displays
10.12.26 Boeing Proprietary
Unusual Attitude
The Unusual Attitude (UA) symbology is displayed when:
• pitch is less than -20 degrees, or
• pitch is greater than + 35 degrees, or
• roll exceeds 55 degrees in either direction.
1 Unusual Attitude symbology
1
PRELIMINARY
2
PRELIMINARY
3
787 Flight Crew Operations Manual
Flight Instruments, Displays -
Head-Up Display System -
Displays
Boeing Proprietary 10.12.27
The Unusual Attitude (UA) symbology will remain displayed until:
• pitch angle is between -5 degrees and 10 degrees (relative to horizon) for
5 seconds, and
• roll angle is less than 10 degrees for 5 seconds.
Displayed in center of HUD pitch scale at +90 degree pitch line.
Displayed in center of HUD pitch scale at -90 degree pitch line.
HUD Takeoff
Displays relative (lateral) position between ILS/GLS directed course line and
current airplane position.
For additional information refer to Chapter 4 – Automatic Flight, and Chapter 11
– Flight Management, Navigation.
2 Zenith Symbol
3 Nadir Symbol
1 Ground Reference and Guidance Cues
1
PRELIMINARY
787 Flight Crew Operations Manual
Flight Instruments, Displays -
Head-Up Display System -
Displays
10.12.28 Boeing Proprietary
HUD Controls
Combiner
Combines the overhead unit projected flight symbology with the pilot’s view
through forward window.
Combiner Locking Lever
　
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