737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
FMC Messages
MN-FLT-OH-201
11.60.15
ALERTING MESSAGE
CAUSE
CORRECTIVE ACTION
VERIFY POS:
FMC-RADIO
Position information is
contradictory.
Refer to FMC
Navigation Check
Supplementary
Procedure.
VERIFY POS:
IRS-FMC
Position information is
contradictory.
Refer to FMC
Navigation Check
Supplementary
Procedure.
VERIFY POS: IRS-IRS Position information is
contradictory.
Refer to FMC
Navigation Check
Supplementary
Procedure.
VERIFY POS:
IRS-RADIO
Position information is
contradictory.
Refer to FMC
Navigation Check
Supplementary
Procedure.
VERIFY POSITION
(on ground)
Position information is
contradictory.
Clear message. Check
accuracy of manually
entered data. Crosscheck
IRS, GPS and FMC
positions. Manually
re-align both IRS's if
needed.
VERIFY RNP
Underlying RNP value is
less than manually
entered value.
Enter appropriate RNP.
VERIFY TAKEOFF
SPEEDS
A PERF INIT change
has been made after
takeoff speeds were
specified.
On TAKEOFF REF page
1, accept previous V
speeds, or reject previous
V speeds and enter new
V speeds.
March 1, 2021