737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
11.31.4
MN-FLT-OH-201
Maintenance Index Page
The MAINT BITE INDEX page is available only on the ground and provides
access to data for use by maintenance personnel.
1
INDEX
Push – displays the INIT/REF INDEX page.
Navigation Position
The FMC determines present position from the IRS, GPS, and navigation radios.
The FMC uses its calculated present position to generate lateral steering
commands along the active leg to the active waypoint.
When the FMC Source Select Switch is positioned to NORMAL, the left FMC
becomes primary, however, data from both FMCs is combined to determine a
composite position and velocity for guidance and map displays.
FMC Position Update
On the ground, the FMC calculates present position based on GPS data. If GPS
data is not available, the FMC calculates present position based on IRS data.
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March 1, 2021
