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2 Cruise Altitude (CRZ ALT)
3 Economy Speed (ECON SPD), Selected Speed (SEL SPD)
4 EPR
5 Required Time Of Arrival (RTA) PROGRESS
787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Cruise
11.42.20 Boeing Proprietary
ECON
• Push – selects VNAV ECON mode.
• Displays when an RTA waypoint is not in the flight plan and VNAV is not
in the economy mode.
RTA/ECON
• Push – selects RTA speed mode. Displays ECON prompt.
• Displays when an RTA waypoint is in the flight plan and VNAV is not in
the RTA mode.
Estimated time of arrival and calculated fuel remaining at the destination.
Displays the same data for the alternate airport when a DIVERT NOW
modification is selected from the ALTN page.
When a route modification is pending, the header displays ETA/FUEL W/MOD.
Calculations are based on optimum step climbs and cruise altitudes.
Push (below engine-out maximum altitude) –
• displays MOD EO CRZ page
• changes target speed line title to EO SPD
• upon execution, thrust reference limit changes to CON.
Push (above engine-out maximum altitude) –
• displays MOD LRC D/D page
• lowers CRZ ALT to engine-out maximum altitude
• changes target speed line title to LRC SPD
• upon execution, thrust reference limit becomes CON.
Push – displays long range cruise page.
Engine Out Cruise
Engine out VNAV guidance displays on the EO CRZ or LRC D/D page.
Engine-out data is also available with both engines operating.
The modified page displays engine-out performance limitations. Manual entries
are allowed. When above the maximum engine-out cruise altitude, VNAV
calculates engine-out guidance for drift down (D/D). The LRC D/D page changes
to the EO LRC CRZ page when reaching the engine-out cruise altitude.
Subsequent engine-out cruise climb or descent is accomplished the same as two
engine cruise climb or descent.
6 Economy Speed or Required Time Of Arrival/Economy
7 Destination ETA/FUEL
8 Engine Out (ENG OUT)
9 Long Range Cruise (LRC)
787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Cruise
Boeing Proprietary 11.42.21
As the airplane gross weight decreases, maximum altitude increases. A step climb
may be possible under these conditions.
The example is based on a cruise altitude above the maximum engine-out altitude.
When ENG OUT is first selected, the default target speed is LRC SPD.
Displays LRC D/D (for a title with “D/D”, airplane is above MAX altitude)
Displays EO XXXKT CRZ or EO M.YYY CRZ when controlling to a selected
MCP speed
1 Page Title
EXEC
3
2 42
1
5
ACTXXX CLB
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ---
ENG OUT>
MOD XXX CRZ
<EO SPD
<CO SPD ALL ENG>
LRC S PD
C R Z A L T
E P R
ST E P OP T M AXR E C MD
KO R D E T A / F U EL
T O F L 2 4 6
1920Z/ 107NM
2055Z/ 30.5
FL24 FL246 FL2
2
ICAO
1.23
4
LRC D/D
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ---
ACT
2
FL 0
/ 3
<EO SPD LRC>
w8mt-34-00-0069
2
3
4
5
1
6
7
8
787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Cruise
11.42.22 Boeing Proprietary
Displays EO D/D when EO SPD selected
Displays EO LRC CRZ when reaching engine out cruise altitude
Displays EO CRZ CLB or EO CRZ DES when EO SPD selected and the airplane
is below the engine-out maximum altitude.
Displays altitude from MAX ALT line when current CRZ ALT above MAX ALT.
Manual entry of an altitude above maximum engine-out altitude results in the
CDU help window message, “MAX ALT FLXXX”.
Valid entries are the same as all engine cruise page.
Displays the target speed or Mach in magenta.
Manual entry is allowed.
Valid entries are the same as all engine cruise page.
A manually entered speed changes the line title to SEL SPD.
ECON can be replaced with long range cruise (LRC), company (CO SPD), or
engine out (EO SPD) speed using prompts at the bottom of the page.
Selecting any speed shows engine out speed (EO SPD) as a select prompt at 6L.
Manual entries may change MAX altitude.
Push – Modifies the page with company speed, engine out data from the Airline
Policy page.
Push – enables execution of engine out minimum drag speed profile.
Displays when EO LRC, EO SEL SPD, or CO SPD is the active speed mode.
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787机组操作手册Flight Crew Operations Manual 3(67)
