737 MAX Flight Crew Operations Manual
Supplementary Procedures -
Airplane General, Emer. Equip.,
Doors, Windows
SP.1.6
MN-FLT-OH-201
Fuel Crossfeed Valve Check
Unless accomplished by maintenance personnel prior to the ETOPS
flight, do the following steps on the ground prior to engine start:
Crossfeed selector ................................................................. Open
Verify that the VALVE OPEN light illuminates bright, then dim.
Crossfeed selector .................................................................Close
Verify that the VALVE OPEN light illuminates bright, then
extinguishes.
During the last hour of cruise, do the following steps:
Crossfeed selector ................................................................. Open
Verify that the VALVE OPEN light illuminates bright, then dim.
Crossfeed selector .................................................................Close
Verify that the VALVE OPEN light illuminates bright, then
extinguishes.
March 1, 2021