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737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
FMC Preflight
11.40.26 MN-FLT-OH-201
2
PLAN/FUEL (SENS, CALC, MAN)
PLAN entry facilitates pre-flight calculations of takeoff speeds and trip fuel
predictions based on anticipated takeoff fuel load. Entries are deleted at engine
start and are replaced by totalizer fuel quantity if valid or else by a manual fuel
entry.
Displays the total fuel and indicates the source of the fuel being used for FMC
calculations (also see FUEL MONITORING section 11.32):
• SENS – Totalizer value default or as selected by the crew on FUEL
PROGRESS 5/5 page.
• CALC – FMC Calculated value as selected by the crew on the FUEL
PROGRESS 5/5 page.
• MAN – Indicates a Manual pilot entry if CALCULATED is selected on
PROGRESS 5/5 page.
3
Zero Fuel Weight (ZFW)
Airplane zero fuel weight is required. Normally the ZFW is entered from the
airplane dispatch papers and the FMC calculates the airplane gross weight.
Enter the airplane zero fuel weight.
Valid entry is xxx or xxx.x.
Calculated zero fuel weight is automatically displayed if airplane gross weight is
entered first and fuel on board is valid.
4
RESERVES
Enter fuel reserves for the route.
Entry is required to complete the preflight.
Valid entry is xx or xx.x.
5
COST INDEX
The cost index is used to calculate ECON climb and cruise speeds. The value
reflects the relative impacts on overall trip cost of fuel cost as compared to other
direct hourly operating costs.
Enter the cost index for ECON calculations.
Entry is required to enable use of VNAV mode.
Valid entries are 0 to 500. 0 causes the ECON speed to be MAX RANGE; 500
results in a minimum time flight.
Entry of a company route on RTE page causes any company stored value of cost
index to be automatically displayed. A manual entry has priority.
March 1, 2021