787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Automatic Flight -
System Description
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 4.20.5
An EICAS message is displayed for any fault which limits the capability of the
automatic landing system. Aural alerts for EICAS messages not affecting safety
of flight are inhibited until after touchdown. Changes in autoland status below 200
feet, other than a transition to NO AUTOLAND status, are inhibited.
AFDS Flight Mode Annunciations
The flight mode annunciations are displayed just above the PFD and HUD AFDS
status annunciations. The mode annunciations, from left to right, are:
• autothrottle
•roll
•pitch
Engaged or captured modes are shown at the top of the flight mode annunciator
boxes in large green letters. Armed modes (except for TO/GA in the air) are shown
in smaller letters (white on the PFD) at the bottom of the flight mode annunciator
boxes. Degradations of a specific mode while the autopilot is engaged are
annunciated by an line (amber on the PFD) drawn through the mode
annunciations. A green box is drawn around the mode annunciation for 10 seconds
when a mode first becomes active, and when the line through a degraded mode is
removed.
Autothrottle Modes
The autothrottle modes are:
• THR – The autothrottle applies thrust to maintain the vertical speed
required by the pitch mode
• THR REF – Thrust is set to the selected thrust limit displayed on EICAS
• IDLE – Displayed while the autothrottle moves the thrust levers to idle;
IDLE mode is followed by HOLD mode
• HOLD – The thrust lever autothrottle servos are inhibited. The pilot can set
the thrust levers manually
• SPD – The autothrottle maintains the selected speed displayed on the PFD
and HUD. Speed can be set by the MCP IAS/MACH selector or by the
FMC, as shown on the CDU CLIMB, CRUISE, or DESCENT page. The
autothrottle does not exceed the operating speed limits or the thrust limits
displayed on the EICAS
Roll Modes
The roll modes are:
LNAV –
• LNAV (armed) – LNAV is armed to engage when parameters are met.
• LNAV (engaged) – LNAV engages if above 50 feet, and within 2 1/2 NM
of the active route leg. The AFDS follows the active leg displayed on the
ND
February 15, 2010
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