787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
FMC Cruise
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 11.42.29
Displays:
• the STEP TO altitude from the RTE LEGS page
• a calculated step climb altitude based on the step size
Manual entry is allowed.
Blank when:
• there is no active flight plan, or
• within 200 NM of the T/D point, or
• within 500 NM of the destination, or
• in the EO D/D phase
Displays the ETA and DTG to the step climb point where a climb to the STEP TO
altitude minimizes trip cost (ECON CRZ) or fuel (other CRZ speed).
Displays NOW passing the step climb point.
Displays NONE if planned step cannot be accomplished.
Line title changes to AVAIL AT when the climb is restricted by thrust or buffet.
Line title changes to TO T/D when within 200 NM of the top of descent or within
500 NM of the destination. ETA and DTG are relative to the T/D point.
The data is the same as displayed on the PROGRESS page.
Blank when RTA is active.
OPT –
• with ECON speed selected, displays altitude which minimizes trip cost
based on weight and cost index
• with LRC, EO, CO, or SEL speed selected, displays altitude which
minimizes trip fuel based on weight
• does not reflect the effect of speed if speed intervention (MCP IAS/MACH
window) is selected
MAX – displays maximum sustainable altitude based on:
• current gross weight
• temperature
• number of engines operating
• cruise reference thrust limit default set by airline (CRZ or CLB)
• speed (ECON, LRC, SEL, EO, or CO) option
• residual rate of climb default set by airline (range: 100 to 999 feet per
minute)
• disregarding altitude or speed constraints
• does not reflect the effect of speed if speed intervention (MCP IAS/MACH
window) is selected
4
AT
5
Optimum Altitude, Maximum Altitude, and Recommended Altitude
October 31, 2007
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