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be manually selected.
Altitude Intervention
If an unplanned level-off is required, setting the altitude window to the required
altitude causes the airplane to level at the set altitude. VNAV SPD changes to
VNAV ALT. The climb can be continued by setting the altitude window to a higher
altitude and pushing the altitude selector. If the altitude window is set to an altitude
above other altitude constraints, each altitude constraint can be deleted by each
push of the altitude selector. If cruise altitude is set in the altitude window, all
waypoint altitude climb constraints to the T/C can be deleted by selection of the
CLB DIR> prompt on the CLB page.
Climb Page
The climb page is used to evaluate, monitor, and modify the climb path. The data
on the climb page comes from preflight entries made on the route and performance
pages, and from the airline policy file.
The climb page is the first of the three pages selected with the VNAV function key.
When the FMC changes to the cruise mode, the climb page data is blanked.
FMC climb can be economy, fixed speed, or engine out.
787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Takeoff and Climb
Boeing Proprietary 11.41.3
Displays cruise altitude entered on PERF INIT page.
Valid entries are: XXX, XXXX, XXXXX, or FLXXX. Altitude displays in feet or
flight level depending on transition altitude.
The altitude can be changed by two methods:
• A new cruise altitude can be manually entered from the CDU at any time.
The modified cruise altitude displays in shaded white until executed.
• A new cruise altitude can be entered from the MCP, if intermediate
altitude constraints do not exist between the airplane altitude and the MCP
altitude. Set cruise altitude in the altitude window and push the altitude
selector. The cruise altitude changes without modification or execution.
ECON SPD:
• speed based on cost index in CAS or Mach
• used by FMC at altitudes above all waypoint speed constraints, speed
restrictions, and speed transition altitudes.
Valid entries are CAS or Mach.
1 Cruise Altitude (CRZ ALT)
2 Economy Speed (ECON SPD), Selected Speed (SEL SPD)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
CLIMB MODE
ACT ECON CLB
CR Z A L T A T R U B EL
E R R O R
LO L O NG
T R A N S A L T
S P D R E S T R M A X A N G L E
S P D T R A N S
E C O N S P D
230/ 50000
350 2
18000
215
ENG OUT>
CLB DIR
250/10000
280/.810
FL350
240/ 8000
1
>
/ 3
VNAV
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
<ECON ENG OUT>
1
2
3
4
5
7
8
9
10
11
12
6
787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Takeoff and Climb
11.41.4 Boeing Proprietary
SEL SPD:
• displays when intermediate level off required below an existing speed
constraint
• displays when flight crew enters speed
Valid entries are CAS or Mach.
The FMC commanded speed is magenta. Below CAS/Mach transition altitude,
CAS is magenta and Mach is white. Above CAS/Mach transition altitude, Mach
is magenta and CAS is white.
The speed transition line displays the transition speed/altitude from one of these
sources:
• the navigation database value for the origin airport
• the value specified from the airline policy page
• a default speed of 250 knots or the airplane performance value of
VREF+80 knots and 10,000 feet (example 250/10000), if there is no
airline policy value.
Magenta when it is FMC command speed.
Not displayed above transition.
Can be deleted.
Speed restrictions for an altitude less than the cruise altitude are manually entered
on this line.
Dashes before entry by flight crew.
Valid entry is a CAS and altitude (example 240/8000).
An entry creates a modification. Entry is shaded white until executed; magenta
when it is FMC command speed.
Push – changes climb speed to ECON. Must be executed.
Prompt displays when the climb speed is not ECON.
The page title displays the type of climb:
• ECON – speed based on a cost index
• LIM SPD – speed based on airplane configuration limiting speed
• MCP SPD – MCP speed intervention selected
• EO – engine out mode selected
• VREF+80 – engine failure detected during the takeoff portion of the
climb.
3 Speed Transition (SPD TRANS)
4 Speed Restriction (SPD RESTR)
　
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