787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
Flight Management System
Operation
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 11.31.3
Flight Complete
Thirty seconds after engine shutdown, the flight complete phase clears the active
flight plan and load data. Some preflight data fields initialize to default values in
preparation for the next flight.
Operational Notes
When operating in the LNAV and VNAV modes, observe system operation for
unwanted pitch, roll, or thrust commands. If unwanted operation is observed,
select heading select and flight level change modes.
The system must be carefully monitored for errors following:
• activation of a new database
• power interruption
• IRS failure
The FMC does not sequence the active waypoint when more than 21 NM off the
active route and not on an offset route. Return to the active route can be
accomplished using the DIRECT TO or INTERCEPT COURSE TO/FROM
procedures.
When a waypoint is in the route more than once, certain route modifications (such
as DIRECT TO and HOLD) use the first waypoint in the route.
Some SIDs or STARS contain a heading vectors leg. VECTORS waypoints
display on the ND as a magenta line without an end point leading away from the
airplane symbol. If LNAV is active, the DIRECT TO or INTERCEPT COURSE
TO/FROM procedures can be used to start waypoint sequencing beyond the
vectors leg.
When entering airways in a route page, the start and end waypoints must be in the
database. A route segment must be entered as a DIRECT leg.
If the engines remain operating between flights, entering a new cruise altitude
before the next flight recalculates the proper vertical profile.
If a climb to cruise altitude is necessary after completing a descent, a new cruise
altitude entry must be made. Cruise altitude can be entered on the CLB page.
DIRECT TO courses are segments of a great circle route. When entering a
DIRECT TO waypoint on the LEGS page, the course above the waypoint before
execution is the arrival course at the waypoint. However, after execution, the
course is the current course to fly to the waypoint. These courses may not be the
same.
October 31, 2007
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