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 11.42.25
Enter the cruise altitude as an altitude constraint and the letter S. The FMC
assumes the step climb starts at the waypoint. Accomplish the step climb at the
waypoint with the steps described in cruise climb.
Calculated Step Climb
When a non–zero value is entered into the STEP SIZE line on the PERF INIT or
CRZ page, the FMC calculates optimum points for step climbs as the airplane
performance permits. The climb altitude is determined by the value in STEP SIZE.
Multiple step climbs are possible based on performance and route length. VNAV
commands the step climbs, if the MCP altitude and the FMC CRZ ALT are set to
the new altitude.
The FMC calculates step climb points as a function of lateral flight plan, speed
mode, present and step to altitude, and gross weight. The gross weight for a step
from present CRZ ALT to STEP TO altitude is the gross weight at which the
optimum altitude is halfway between the two altitudes.
1
Step Climb Altitude
February 15, 2010
To Next Page
Loading...
