737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
Controls and Indicators
11.10.10
MN-FLT-OH-201
1
FMC Alert Light
Illuminated (amber) –
• an alerting message exists for both CDUs, or
• test switch is in position 1 or 2.
• "USING RSV FUEL" alerting mesage displayed on the Engine Display
and CDU scratchpads.
• "INSUFFICIENT FUEL" alerting mesage displayed on the Engine
Display and CDU scratchpads.
• "FUEL DISAGREE" alerting mesage displayed on the Engine Display
and CDU scratchpads.
Push – both pilots’ FMC alert lights extinguish.
Global Positioning System (GPS) Light
1B401, 1B402, 1B801 - 1B824
1
Global Positioning System (GPS) Light
Illuminated (amber) –
• indicates failure of both GPS sensor units
• indicates failure of a single GPS sensor unit when either system
annunciator panel is pushed to initiate a recall
• with single GPS sensor failure, light extinguishes when the system
recall is reset.
IRS
L
R
ALIGN
DC FAIL
FAULT
ALIGN
FAULT
OFF
NAV
ALIGN
DC FAIL
ATT
OFF
NAV
ALIGN
ATT
ON DC
ON DC
GPS
ILS
GLS
INOP
INOP
AFT OVERHEAD PANEL
1
March 1, 2021