737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
FMC Preflight
MN-FLT-OH-201
11.40.27
6
INDEX
Push – displays the INIT/REF INDEX page.
7
Trip/Cruise Altitude (TRIP/CRZ ALT)
Trip altitude is automatically computed and displayed whenever entries have been
made for the ORIGIN, DEST, GROSS WT, and COST INDEX. Otherwise, the
field is blank.
Trip altitude is the predicted minimum cost altitude determined by operator
constraints. Provides crew a reference for selecting a planned cruise altitude.
Cruise altitude is required.
Enter the cruise altitude for the route.
Automatically displays this cruise altitude on the CLB, CRZ, and RTE Legs
pages.
8
Cruise Wind (CRZ WIND)
Cruise wind entry provides input to optimize FMC calculations.
Enter the forecast cruise wind.
Entry is propagated onto the RTE DATA page.
If no entry made, the FMC assumes zero wind for preflight predictions.
9
Top of Climb Outside Air Temperature (T/C OAT)
T/C OAT entry provides input to optimize FMC calculations.
Entry causes ISA DEV to be computed and displayed.
Enter top of climb OAT.
If no entry made, FMC assumes ISA value.
Note:
The FMC takes advantage of sensed static air temperature (SAT) to
automatically provide updating of the MAX altitude. The revised
temperature model applies after climbing 5000 feet above the departure
runway elevation. Calculation of MAX altitude uses the actual ISA
deviation derived from the actual sensed SAT projected up to the MAX and
OPT altitude solutions. T/C OAT, if entered on the PERF INIT page, is
used for the preflight planning forecast of MAX/OPT altitude.
10
Transition Altitude (TRANS ALT)
Displays 18,000 feet at FMC power up.
March 1, 2021