737 MAX Flight Crew Operations Manual
Warning Systems -
System Description
MN-FLT-OH-201
15.20.13
Radio Altitude Based Alerts
AURAL ALERT
VISUAL ALERT
DESCRIPTION
PULL UP
PULL UP on both
attitude indicators
Follows SINK RATE alert if excessive
descent rate continues or increases.
Follows radio altitude based TERRAIN
alert if excessive terrain closure rate
continues and landing gear and/or flaps
are not in landing configuration.
TERRAIN
PULL UP on both
attitude indicators
Excessive terrain closure rate.
DON’T SINK
PULL UP on both
attitude indicators
Excessive altitude loss after takeoff or
go–around.
GLIDESLOPE
BELOW G/S
P–INHIBIT
lights
Deviation below glideslope. Volume and
repetition rate increase as deviation
increases.
Pushing the ground proximity BELOW
G/S P-INHIBIT light cancels or inhibits
the alert below 1,000 feet RA.
SINK RATE
PULL UP on both
attitude indicators
Excessive descent rate.
TOO LOW,
FLAPS
PULL UP on both
attitude indicators
Unsafe terrain clearance at low airspeed
with flaps not in a normal landing
position.
Pushing the ground proximity flap
inhibit switch to FLAP INHIBIT inhibits
the alert.
TOO LOW,
GEAR
PULL UP on both
attitude indicators
Unsafe terrain clearance at low airspeed
with landing gear not down.
Pushing the ground proximity gear
inhibit switch to GEAR INHIBIT
inhibits the alert.
October 26, 2021