737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
FMC Messages
MN-FLT-OH-201
11.60.7
ALERTING MESSAGE
CAUSE
CORRECTIVE ACTION
INSUFFICIENT FUEL
FMC fuel at the
destination is predicted
to be less than 2000
lbs/900 kilograms.
Scratchpad message
shows for Active and
Mod Flight Plan.
Illuminates the FMC
P/RST Light for Active
and Mod Flight Plan.
Message displayed on
Engine display for the
Active Flight Plan only.
Refer to
INSUFFICIENT FUEL
non-normal checklist in
the QRH.
The Engine Display
message will remain
until the condition is no
longer valid.
IRS MOTION
IRS has automatically
restarted the alignment
due to detection of
excessive motion.
Clear message and
attempt to reduce
airplane movement, if
practicable.
IRS-(L or R) DRIFT
An FMC has detected
that the IRS-(L or R)
position or velocity data
is unreasonable, and
deselected IRS-(L or R)
due to velocity
divergence or position
blunder checks.
Refer to FMC
Navigation Check
Supplementary
Procedure.
IRS POS/ORIGIN
DISAGREE
Position information is
contradictory.
Refer to FMC
Navigation Check
Supplementary
Procedure.
March 1, 2021