787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
FMC Cruise
Copyright © The Boeing Company. See title page for details.
11.42.30 D615Z003-TBC
RECMD – displays the most economical altitude to fly for the next 500 NM based
on gross weight; selected cruise speed, including specified cruise speed segments;
and constant altitude cruise over a fixed distance taking into account the route of
flight, entered winds, and temperature forecast. The FMC evaluates altitudes up
to 9,000 feet below the current CRZ ALT and up to less than MAX altitude.
Recommended altitudes are selected consistent with the step climb schedule and
specified step size. If a step size of zero has been selected, the recommended
cruise level is selected assuming a 2,000 foot step size. The recommended altitude
is set to the CRZ ALT when within 500 NM of the T/D.
For additional information, refer to:
• Route Data Page
, Ch. 11, Sec. 42
• Wind Data
, Ch. 11, Sec. 42
For RTA CRZ mode active: OPT, MAX, and RECMD are not computed. OPT,
MAX, and RECMD headers are blank.
Constant Speed Cruise
A speed for a cruise segment can be specified. A cruise segment has a start
waypoint and an end waypoint. The airplane maintains a constant speed between
the two waypoints. The waypoints must be in the cruise phase. The FMC controls
the speed after the end waypoint or top of descent.
Modification must be executed.
February 15, 2010
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