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When first powered, the FMS is in the preflight phase. When completing a phase,
the FMS changes to the next phase in this order:
Preflight
During preflight, the flight crew enters the flight plan and load sheet data into the
CDU. Some data can be entered by datalink. The flight plan defines the route of
flight from the origin to the destination and initializes LNAV. Flight plan and load
sheet data provide performance data to initialize VNAV.
Required preflight data consists of:
Optional preflight data includes:
Preflight starts with the IDENT page. If the IDENT page is not displayed, it can
be selected with the IDENT prompt on the INIT/REF INDEX page. Visual
prompts help the flight crew select CDU preflight pages. Preflight pages can be
manually selected in any order.
After data on each preflight page is entered and checked, pushing the lower right
line select key selects the next preflight page. After selecting ACTIVATE on the
ROUTE page, the execute (EXEC) light illuminates. Pushing the EXEC key
activates the route.
The departure/arrival (DEP/ARR) page can be used to select a SID. Selection of
the SID may cause a route discontinuity. Resolution of the discontinuity and
execution of the modification should be accomplished on the ROUTE or LEGS
page.
• preflight
• takeoff
• climb
• cruise
• descent
• approach
• flight complete
• initial position (when not
provided by GPS)
• route of flight
• performance data
• takeoff data
• navigation database selection
• route 2
• alternate airport
• standard instrument departure
(SID)
• standard terminal arrival route
(STAR)
• thrust limits
• wind
787 Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
11.31.2 Boeing Proprietary
Once the crew has entered the route and PERF INIT page information, the crew
selects FLIGHT INITIALIZATION on the EFB. The EFB receives the minimum
required information from the FMC (GWT, ORIGIN, OAT, QNH and takeoff
runway). The crew then fills in other required or optional information in the EFB
performance tool application and selects CALC. Once the EFB application has
generated the appropriate takeoff data (reference speeds, runway condition,
takeoff thrust and flap setting) the crew selects SEND TO FMC. A “•FMC”
COMM alert is displayed with an associated aural. A TAKEOFF UPLINK CDU
help window message is then displayed on the CDU. The crew selects LOAD or
REJECT after reviewing the data on the THRUST LIMIT, TAKEOFF REF 1/2
and TAKEOFF REF 2/2 pages.
When all required preflight entries are complete, the PRE–FLT line title on the
TAKEOFF REF page is replaced by PREFLIGHT COMPLETE. The THRUST
LIM prompt displays at the next page select line location.
Takeoff
The takeoff phase starts with selection of TO/GA and terminates with thrust
reduction for climb. LNAV and VNAV can be armed before takeoff to activate at
the applicable altitude (refer to Chapter 4, Automatic Flight).
Climb
The climb phase starts at thrust reduction for climb and terminates at the top of
climb (T/C) point. The T/C is where the airplane reaches the cruise altitude
entered on the PERF INIT page.
Cruise
The cruise phase starts at the T/C point and terminates at the top of descent (T/D)
point. Cruise can include step climbs and en route descents.
Descent
The descent phase starts at the T/D point or when the VNAV descent page
becomes active, and terminates at the start of the approach phase.
Approach
The approach phase starts when the first waypoint of the procedure sequences or
when the runway is the active waypoint and the distance to go is less than 25 nm.
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.
787 Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
Boeing Proprietary 11.31.3
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 will not sequence the active waypoint when more than 21 nm off the
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787机组操作手册Flight Crew Operations Manual 3(21)
