Boeing 787-8 - Page 1340

787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
FMC Cruise
Copyright © The Boeing Company. See title page for details.
11.42.28 D615Z003-TBC
Displays the default step climb size of ICAO.
Valid entries are altitudes from 0 to 9000 in 1000 foot increments.
Entry of a "0" value causes the FMC to compute ETA and fuel predictions for a
constant cruise altitude.
Deletion of a manual entry defaults back to ICAO.
When the cruise climb start point is the next VNAV event, the line title changes to
TO STEP CLIMB.
Displays the ETA and DTG to the point where the step climb starts.
If the airplane passes the step climb point and has not started to climb, the ETA
and DTG are replaced with the word NOW.
When the FMC calculates a step climb is not advised, the ETA and DTG are
replaced with the word NONE.
An altitude can be entered for a step climb evaluation. The FMC calculates the
predicted step climb data and displays the results on this page and the PROGRESS
page.
Entering a zero value for STEP SIZE causes the FMC to calculate performance
based on a constant altitude flight at the CRZ ALT. Entering a valid, non–zero
increment or ICAO step size causes the FMC to calculate performance based on
accomplishing step climbs at calculated step climb points.
Step climb altitudes entered on the RTE LEGS page can be higher or lower than
the CRZ ALT. These step climb altitudes cannot be overwritten on the CRZ page.
When using the ICAO step size, the STEP TO altitude is the next higher altitude
above the OPT altitude corresponding to the direction of flight, based on the CRZ
ALT entered before takeoff. Changes to CRZ ALT while in flight do not affect
calculation of STEP TO altitudes using ICAO step sizes. However, if an alternate
route (for example, Route 2) is activated in flight, the hemispheric altitude is
calculated using the current CRZ ALT.
When using an altitude increment step size, the STEP TO altitude is the next
higher altitude above OPT calculated by adding the STEP SIZE increment to the
FMC CRZ ALT.
When entering a cruise altitude above maximum altitude, the CDU help window
message MAX ALT FLXXX displays.
Entry of a new cruise altitude deletes all waypoint altitude constraints at or above
the new cruise altitude.
2
TO STEP CLIMB
3
STEP TO
August 14, 2009