737 MAX Flight Crew Operations Manual
Supplementary Procedures -
Fuel
MN-FLT-OH-201
SP.12.5
Note:
Main tanks No. 1 and No. 2, and the center tank refueling
valves each have a red override button that must be
pressed and held while fuel is being pumped into the
tank. Releasing the override button allows the spring in
the valve to close the valve.
Caution must be observed not to overfill a tank, since there is no
automatic fuel shutoff during manual operation. When the desired
amount of fuel has been pumped into the tanks, the refueling valves for
the respective tanks can be released.
Ground Transfer of Fuel
YA202, YA211, YA571 - YA648, YB104 - YV671
(SB Changes YA221 - YA252)
Fuel can be transferred from one tank to another tank using the fuel pumps,
fueling valve, defueling valve, and crossfeed valve. AC power must be
available.
Note:
Before transferring fuel, ensure that the associated FUEL PUMP
LOW PRESSURE lights are operating.
CAUTION: Transferring fuel with passengers onboard is
prohibited, unless the fuel quantity in the tank from
which fuel is being taken is maintained at or above 2000
pounds/900 kilograms.
To transfer fuel from the main tanks to the center tank:
Main tank fuel pump switches .................................................ON
Crossfeed selector .................................................................Open
Manual defueling valve .........................................................Open
Center tank fueling valve switch .........................................OPEN
Fuel transfer...................................................................... Monitor
The center tank fuel quantity indicator shows an increase in fuel.
The main tank indicators show a decrease in fuel.
When a FUEL PUMP LOW PRESSURE light illuminates, turn
OFF the associated fuel pump.
When the required amount of fuel has been transferred:
Center tank fueling valve switch ....................................CLOSED
Manual defueling valve ...................................................................Close
March 1, 2021
