737 MAX Flight Crew Operations Manual
Warning Systems -
System Description
15.20.10
MN-FLT-OH-201
Altitude Alert Profile
1B401, 1B402, 1B801 - 1B824
Ground Proximity Alerts
The GPWS provides alerts for potentially hazardous flight conditions involving
imminent impact with the ground.
The GPWS provides alerts based on radio altitude and combinations of barometric
altitude, airspeed, glideslope deviation, airplane configuration and airplane
attitude. The alerts are for:
• excessive descent rate
• excessive terrain closure rate
• altitude loss after takeoff or go-around
• unsafe terrain clearance when not in the landing configuration
• excessive deviation below an ILS glideslope
1B785, 1B786, 1J585 - 1J594
• excessive deviation below glide path
• altitude callouts
• reactive windshear
+300'
-300'
Acquisition - Aural warning tone momentarily sounds.
NO INDICATIONS
+900'
-900'
SELECTED
ALTITUDE
CAUTION AURAL
CAUTION
AURAL
A box shows around the selected altitude display
Deviation - Aural warning tone momentarily sounds
and current altitude box turns amber and flashes.
and the box around current altitude becomes bold.
ALTITUDE
SEL
October 26, 2021
