737 MAX Flight Crew Operations Manual
Flight Instruments, Displays -
MAX Display System – Controls
and Indicators
MN-FLT-OH-201
10.15.21
ISFD Failure Flags
The OUT OF ORDER annunciation replaces the display when a total ISFD system
failure occurs.
1
Airspeed flag
Airspeed information has failed.
2
ILS localizer failure flag
ILS localizer has failed.
3
ILS glideslope failure flag
ILS glideslope has failed.
4
Altitude flag
Altitude information has failed.
5
Attitude flag
Attitude information has failed.
6
Heading flag
Heading data has failed.
ATT
LOC
HDG
A
L
T
S
P
D
G
/
S
OUT OF ORDER
ISFD
3
4
5
6
1
2
March 1, 2021