.
threshold crossing height for the runway
YA721, YA722
.
threshold crossing height for the runway if GP X.X ° displayed on the
LEGS page
.
the missed approach point (MA-XX) altitude constraint.
YD652 - YD655 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 shall be valid while flying the discontinuity.
Target Speed (TGT SPD)
Displays the command speed maintained by VNAV while descending to
waypoints, constraints, or speed restrictions.
YD651 - YD655
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.
Speed Restriction (SPD REST)
Displays the most restrictive of the following speeds:
.
destination airport speed 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 shall be
displayed as XXX/FLAPS. This shall supersede any other speed
restriction
.
displays XXX/HOLD when decelerating to hold speed prior to hold entry
fix.
Copyright . The Boeing Company. See title page for details.
11.43.4 September 29, 2005
Flight Management, Navigation -FMC Descent and Approach 737 Flight Crew Operations Manual
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.
Economy (ECON)
Displayed on the manual DES pages.
Push – selects the corresponding ECON SPD or ECON PATH DES page.
Descent Forecasts (FORECAST)
Push – selects the DES FORECASTS page.
PATH
Displayed on the SPD DES pages if a path descent is available. Push – selects the corresponding PATH DES page.
Descend Now (DES NOW)
Displayed on the standard DES pages whenever descent is not ACT or MOD.
Blank for any PATH DES page if a path descent is not available.
Push – arms the DES NOW function and illuminates the EXEC light.
On a PATH DES page, execution allows early initiation of PATH descent at 1000
fpm until intercepting the computed path. On a SPD DES page, execution allows
early initiation of a SPD descent at the specified speed (ECON or manual).
Descent Page (During Descent)
Display when any descent mode is active after beginning of descent.
Copyright . The Boeing Company. See title page for details.
Flight Management, Navigation -FMC Descent and Approach 737 Flight Crew Operations Manual
YA613 - YC413, YK101 - YK104
Copyright . The Boeing Company. See title page for details.
11.43.6 June 1, 2005
Flight Management, Navigation -FMC Descent and Approach 737 Flight Crew Operations Manual
YD651 - YD655
Vertical Deviation (VERT DEV)
Displays present deviation (feet HI or LO) from the computed vertical path.
The deviation is always in relation to the path descent profile, regardless of which
page is active (PATH DES or SPD DES).
Blank if a path is not available.
Altitude Restriction (AT XXXXX)
Displays the next waypoint constraint from the RTE LEGS page.
The constraint is speed/altitude. If an airspeed restriction exists at the waypoint, it
will be displayed in large font; otherwise the predicted speed will be displayed in
small font.
Can be deleted on this page.
The display is blank when no constraint exists, or for any PATH DES page if a path
descent is not available.
Copyright . The Boeing Company. See title page for details.
Flight Management, Navigation -FMC Descent and Approach 737 Flight Crew Operations Manual
To Waypoint (TO XXXXX)
Displays computed ETA and distance to go to T/D when not in an active descent mode.
If an early descent is in progress (initiated using DES NOW prompt), ETA and distance to go to original T/D is displayed until passing the T/D.
If a descent mode is active, displays ETA and distance to go to the first of the following points:
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