737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
Controls and Indicators
MN-FLT-OH-201
11.10.9
FMC Source Select Switch
1
FMC Source Select Switch
BOTH ON L –
• selects left FMC for all FMC operations
• right map will annunciate “FMC L.”
NORMAL –
• left FMC controls CDUs and provides input to the autothrottle system
• right FMC operates in synchronization with left FMC
• maps display composite information from both FMCs
BOTH ON R –
• selects right FMC for all FMC operations
• left map will annunciate “FMC R.”
Note:
Moving the source select switch will cause LNAV and VNAV to
disengage.
FMC Alert Light
FMC
NORMAL
BOTH
BOTH
ON R
ON L
FORWARD OVERHEAD PANEL
1
FMC
2
1
TEST
A/T
A/P
P/RST
P/RST
P/RST
1
MAIN PANEL -
CAPTAIN/FIRST OFFICER
March 1, 2021
