737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
FMC Messages
MN-FLT-OH-201
11.60.37
Scratch Pad Messages
INACTIVE ADVISORY
CAUSE
MESSAGE CLEARED
HF IN PROG
The system has sent a
downlink message via
HF and has not yet
received an
acknowledgment from
the service provider.
Advisory clears when all
HF messages have been
acknowledged or the HF
link fails.
CDU SCRATCH PAD
CAUSE
CORRECTIVE ACTION
FORMAT ERROR
Shows when a line select
key associated with
manual entry is selected
and the scratch pad data
does not pass format or
range checking.
Reformat manual entry.
BUTTON PUSH
IGNORED
Shows when a line select
key that has no assigned
function on the display
page is selected.
Select correct line select
key.
NOT ALLOWED
Shows when a line select
key associated with
manual entry is selected
but the scratch pad is
empty.
Enter appropriate data in
scratch pad if applicable.
March 1, 2021
