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11.40.2 December 1, 2000
Flight Management, Navigation -FMC Preflight 737 Operations Manual
Page Entries and Sequence
During preflight, the prompts that appear in the lower right of the CDU page direct the crew through the minimum requirements for preflight completion. Pushing the prompt key for the next page in the flow presents new entry requirements. Additional entries are made on pages to refine the performance and route calculations. If a required entry is missed, a prompt on the TAKEOFF page leads the crew to the preflight page that is missing data.
Supplementary Pages
Supplementary pages are sometimes required. These pages must be manually selected. Manual selection interrupts the normal automatic sequence. Discussions of each normal page include methods to display the page when the automatic sequence is interrupted.
When the route includes SIDs and STARs, they can be entered into the preflight using the DEPARTURES or ARRIVALS pages.
Route discontinuities are removed, the route is modified, and speed/altitude restrictions are entered on the RTE LEGS page. The RTE LEGS page is described in the FMC Takeoff and Climb and FMC Cruise sections of this chapter.
Waypoint, navigation, airport, and runway data is referenced on the REF NAV DATA page or the SUPP NAV DATA page. The REF NAV DATA page and SUPP NAV DATA page are described in the FMC Cruise section of this chapter.
VNAV performance is improved if the forecast winds and temperatures are entered during the preflight.
A single wind and temperature for cruise may be entered on the PERF INIT page. Wind and temperature data for specific cruise waypoints are entered on the RTE DATA page. The RTE DATA page is described in the FMC Cruise section. Wind and temperature for descent is entered on the DES FORECASTS page. The DES FORECASTS page is described in the FMC Descent section.
Initialization/Ident Pages
Note: The preflight pages are presented in the sequence used during a typical preflight.
Initialization/Reference Index Page
The INIT/REF INDEX page provides manual selection of FMC pages. It provides access to pages used during preflight and not normally used in flight.
Flight Management, Navigation -FMC Preflight 737 Operations Manual
Identification (IDENT)
Displays the IDENT page, the first page in the automatic preflight sequence.
Copyright . The Boeing Company. See title page for details.
11.40.4 June 8, 2001
Flight Management, Navigation -FMC Preflight 737 Operations Manual
Position (POS)
Displays the POS INIT page used for IRS initialization.
POS INIT page is also used to enter/update magnetic heading for an IRS which is
in the ATT mode.
Performance (PERF)
Displays the PERF INIT page for initialization of data required for VNAV operations and performance predictions.
TAKEOFF
Displays the TAKEOFF REF page to enter takeoff reference information and V speeds.
APPROACH
Displays the APPROACH REF page for entry of the approach VREF speed.
OFFSET
Displays the LATERAL OFFSET page for initiating a lateral offset.
Navigation Data (NAV DATA)
Displays the REF NAV DATA page to display information about waypoints, navaids, airports, and runways. On the ground, displays the SUPP NAV DATA page if SUPP is entered in the scratchpad prior to selection.
Maintenance (MAINT)
For maintenance use only; displays maintenance pages.
IRS Navigation (IRS NAV)
Allows selection of the appropriate ANCDU page (IRS PROGRESS or IRS LEGS).
Blank if IRS inputs to the CDU are invalid.
Identification Page
Most of the data on this page is for crew verification. The active navigation
database and supplemental database accept manual entries.
The crew verifies FMC data and selects a navigation database on the IDENT page.
Flight Management, Navigation -FMC Preflight 737 Operations Manual
MODEL
Displays the airplane model from the FMC performance database.
Navigation Data (NAV DATA)
Displays the navigation database identifier.
Operational Program (OP PROGRAM)
Displays the Boeing software part number and update version.
INDEX
Push – displays the INIT/REF INDEX page.
Engine Rating (ENG RATING)
Displays the engine thrust stored in the FMC performance database. The line reads (U3) “ENGINES – CFM56–3B–2” (U4 and on) “ENG RATING – 22.0K.”
Active Date Range (ACTIVE)
Displays the effectivity date range for the active navigation database.
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