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Valid entry is a height from 400 to 9999 feet.
Selection of a new rating after takeoff speeds are selected deletes V speeds and
displays the scratchpad message TAKEOFF SPEEDS DELETED.
- - -
- - -
- - -
1
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F 2
0
0
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H
R W 3 1 L 0 0 M
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R E
R E F
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0 0 / U 0 . 0 - - %
1 0 0 F T
FL A P S 5 C L B 1
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P O S S H I F T
W I N D / S L O P E T R I M C G
T H R R E D U C T I O N
E / O A C C E L H T
/ 1 0 0 F T
FL A P / A C C E L HT R E F
- - - - - - - - - - - - - - - - -
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V
V
T A K E O F F R E F
THRUST LIM
TAKEOFF>
REF
INIT XXXXX
<INDEX
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INIT/REF INDEX
2
3
4
5
7
8
9
1
6
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.40.34 D6-30151-425
Flight Management, Navigation -
FMC Preflight
2 Engine Out Acceleration Height (E/O ACCEL HT)
Displays acceleration height for flap retraction with an engine out.
Valid entry is a height from 400 to 9999 feet.
3 Thrust (THR) REDUCTION
Displays flap setting or height for reduction from selected takeoff thrust to armed
climb thrust.
Displays armed climb thrust rating.
Valid entries are:
• 5 for flaps 5, or
• a height from 400 to 9999 feet
4 WIND/SLOPE
Displays wind and runway slope after crew entry.
Valid entries are:
• WIND - HXX, XX for headwind, TXX for tailwind
• SLOPE - UX.X, X.X for upslope, DX.X for downslope
5 INDEX
Push - displays INIT/REF INDEX page.
6 V Speeds (V1, VR, V2)
Displays dashes when:
• required information not entered
• performance calculations inhibited
• IRUs not aligned
Displays FMC calculated speeds when required information entered.
Flight crew entered or selected speeds display in large font and replace calculated
speeds.
Calculated speeds display in small font.
FMC calculated speeds provide VMCA and VMCG protection.
Uplinked speeds replace calculated speeds.
Push -
• selects V1, VR, and V2 to be sent to using systems, or
• crew entered V speeds replace calculated speeds
• display changes to large font; REF and caret no longer display
December 01, 1999
747 Operations Manual
Flight Management, Navigation -
FMC Preflight
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.40.35
If performance data changes:
• FMC replaces existing speeds with FMC calculated speeds in small font
• V speeds are deleted from the PFD
• PFD speed tape message NO V SPD displays
• scratchpad message TAKEOFF SPEEDS DELETED displays
Note: After third engine started, FMC recalculates the takeoff speeds. Any
combination of gross weight, OAT, or pressure altitude resulting in a
takeoff speed change of two or more knots from the previously calculated
speeds, causes the FMC to recalculate takeoff speeds.
7 TRIM, Center of Gravity (CG)
CG displays in small font with caret. Calculated by FMC using WBS inputs.
Valid CG range is 0 to 40.
Line selection or pilot entry displays CG in large font.
Dash prompts display if required WBS inputs not available.
Trim field blank until CG and GR WT selected or entered.
FMC computed trim displays in small font if within the stab trim green band
range. Otherwise, the trim field remains blank.
8 Position (POS) SHIFT
Displays the selected takeoff runway and TO/GA “push” distance from the
runway threshold.
Valid entries are X, XX in + or - hundreds of meters(3 or 03 is 300 meters beyond
the runway threshold; -3 or -03 is 300 meters prior to runway threshold).
Entered value updates FMC position to the TO/GA push point when GPS updating
not active.
Entry of a value after takeoff speeds are selected deletes V speeds and displays the
scratchpad message TAKEOFF SPEEDS DELETED.
9 PRE-FLIGHT
Displays PRE-FLIGHT and title (XXXXX) of incomplete page when preflight is
not complete.
Displays dashes and THRUST LIM when preflight is complete.
Push -
• displays THRUST LIM page when THRUST LIM displayed
• displays incomplete page (XXXXX) when PRE-FLIGHT displayed
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.40.36 D6-30151-425
Flight Management, Navigation -
FMC Preflight
Menu Page
Provides access to other systems that use CDU.
　
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