787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
FMC Cruise
Copyright © The Boeing Company. See title page for details.
11.42.24 D615Z003-TBC
VNAV Modifications
During the cruise phase, VNAV can calculate two types of climbs: cruise and step
climbs. Cruise and planned climbs can be entered by the flight crew. Optimum
step climbs are calculated by the FMC. In all cases, the new climb altitude must
be selected in the MCP altitude window before VNAV commands the climb.
Cruise Climb
Setting an altitude above the current cruise altitude in the MCP altitude window
and pushing the altitude selector causes the cruise altitude to be set to the MCP
altitude and the airplane to climb to the new cruise altitude. The reference thrust
limit is CLB and the pitch flight mode annunciation is VNAV SPD.
Another method to accomplish a cruise climb: set a higher MCP altitude, enter the
altitude in the CRZ ALT line, and execute.
VNAV page title displays CRZ CLB in a climb to cruise altitude.
VNAV page title displays ECON CRZ after level off at cruise altitude.
Planned Step Climb
When a step climb is planned to start at a waypoint, the data can be entered on the
RTE LEGS page. The FMC performance predictions assume the airplane will start
the climb at the identified waypoint.
The FMC displays the distance and ETA to the step point on the PROGRESS
page. The corresponding altitude profile point and identifier is shown on the ND.
1
During Cruise Climb
2
End of Cruise Climb
BLC
23
ZRCNOCETCA
/
23
ZRCNOCETCA
/
2
1
052LF/
052LF/S
o
o
580
TDP
MKY
401
28
04NM
NM
1
October 31, 2007
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