737 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Descent and Approach
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
11.43.4 D6-27370-866-EGP
2 End of Descent Altitude (E/D ALT)
Displays the end of descent altitude.
• for a PATH DES page, displays the altitude restriction for the E/D
waypoint; blank if path descent not available
• for a SPD DES page, displays the altitude restriction for the E/D
waypoint, if an E/D waypoint is present
• if an approach is selected which ends at RWXXX, the E/D altitude will
be Threshold Crossing Height (TCH), 50 feet above the runway.
The end of descent altitude is the altitude constraint or predicted altitude of the last
descent waypoint. End of descent may follow a lateral discontinuity. If a lateral
discontinuity exists, the FMC will construct a great circle path across the
discontinuity and VNAV will be valid while flying the discontinuity.
3 Target Speed (TGT SPD)
Displays the command speed maintained by VNAV while descending to
waypoints, constraints, or speed restrictions.
Displays XXX/MCP when speed intervention is active.
On ECON PATH or ECON SPD DES pages, displays the computed values for
target Mach and airspeed. Speeds are performance limited.
Manual entries may be made and cause the manual PATH or manual SPD DES
page for that value to display (M.720 SPD DES is depicted).
Blank for any PATH DES page if a path descent is not available.
4 Speed Restriction (SPD REST)
Displays the most restrictive of the following speeds:
• speed restrictions at the destination airport minus 10 knots
• waypoint speed restriction if greater than minimum flaps up
maneuvering speed
• minimum flaps up maneuvering speed
• selected Vref + wind correction for landing flap setting
• whenever flaps are extended, the, appropriate flap speed will be
displayed as XXX/FLAPS. This will supersede any other speed
restriction.
• displays XXX/HOLD when decelerating to hold speed prior to hold
entry fix.
Dash prompts displayed when there is no active speed restriction.
Manual crew entries or deletions may be made. HOLD or FLAPS speed may not
be deleted or modified.
September 24, 2015
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