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1 FMC
Push –
• connects FMC to the CDU
• displays last page used
• displays INITIALIZATION page on initial application ofAC power
2 Aircraft Communication Addressing and Reporting System (ACARS)
See Chapter 5, Communications.
3 Satellite Communication System (SATCOM)
See Chapter 5, Communications.
A C M S
< SA T
<
<
<RE Q>
< AC T>
E I C A
SE LE CT>
S C P
SE LE CT>
EF I S CP
A R S
F M C
M EN U
C A
< C M C
<
MENU
AC POWER
APPLICATION
1
2
3
4
5
6
7
8
9
December 01, 1999
747 Operations Manual
Flight Management, Navigation -
FMC Preflight
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.40.37
4 Airplane Condition Monitoring System (ACMS)
Push -
• displays ACMS page
• activates ACMS control of CDU for maintenance use
5 Central Maintenance Computer (CMC)
Operational on ground and in flight above 10,000 feet.
Push -
• displays CMC menu page
• activates CMC control of the CDU for maintenance use
6 Alternate EFIS Control (CP)
See Chapter 10, Flight Instruments, Displays
7 Alternate EICAS Control (CP)
See Chapter 10, Flight Instruments, Displays
8 Active (ACT)
Indicates active CDU controller.
9 REQ
Indicates non-active CDU controller requires pilot action.
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.40.38 D6-30151-425
Flight Management, Navigation -
FMC Preflight
Intentionally
Blank
October 1, 2000
747 Operations Manual
Flight Management, Navigation Chapter 11
FMC Takeoff and Climb Section 41
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.41.1
Introduction
FMC takeoff phase starts with selection of takeoff/go–around (TO/GA).
Preparation for this phase starts in preflight phase and includes entry of
TAKEOFF REF page data.
Takeoff phase changes to climb phase when the FMC commands climb thrust.
Climb phase continues to the top of climb point, where cruise phase starts.
During takeoff and climb, the specific page listed below is used to:
• TAKEOFF REF page – make last minute changes to the departure runway
• DEPARTURES page – make last minute SID selections
• CLIMB page – modify climb parameters and monitor airplane climb
performance
• RTE X LEGS page – modify the route and monitor route progress
• PROGRESS page – monitor the overall progress of the flight
• THRUST LIM page – select alternate climb thrust limits
• DEP/ARR INDEX page – select an approach during a turn–back
Takeoff Phase
When changes are made to the departure runway and SID, TAKEOFF REF and
DEPARTURES pages must be modified to agree. The modified data are entered
the same as during preflight.
With correct takeoff parameters, the FMC commands the selected takeoff thrust
when the TO/GA switch is pushed. During takeoff roll, autothrottle commands
thrust and the FMC commands acceleration to between V2+10 and V2+25 knots,
based on rate of rotation.
Usually, VNAV is armed before takeoff. When armed before takeoff, LNAV
activates at 50 feet above runway elevation and commands roll to fly the active
route leg. VNAV activates at 400 feet above runway elevation and commands pitch
to fly the climb profile.
Climb Phase
At acceleration height or the first movement of the flap handle during flap
retraction, VNAV commands acceleration to:
• 250 knots,
• VREF+100 knots, or
• speed transition associated with the origin airport, whichever is greater
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.41.2 D6-30151-425
Flight Management, Navigation -
FMC Takeoff and Climb
VNAV commanded speed is limited by airplane configuration. At acceleration
height, VNAV commands a speed 5 knots below the flap placard speed, based on
flap handle position.
At the climb thrust reduction point, the FMC commands a reduction to the armed
climb thrust. Passing 10,000 feet, VNAV commands an acceleration to economy
climb speed, which is maintained until entering the cruise phase.Waypoint speed
constraints take priority, provided they are greater than VREF+100 or 250 knots.
During climb, VNAV complies with LEGS page waypoint altitude and speed
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