737 MAX Flight Crew Operations Manual
Automatic Flight -
System Description
MN-FLT-OH-201
4.20.25
Go–Around
Go–Around (GA) mode is engaged by pushing either TO/GA switch. An A/P
go–around requires dual A/P operation and is armed when FLARE armed is
annunciated. If both A/Ps are not operating, a manual F/D go–around is available.
With the A/T Arm switch at ARM, the A/T go–around mode is armed:
• when descending below 2000 feet RA
• when above 2000 feet RA with flaps not up or G/S captured
• with or without the AFDS engaged.
A/P Go–Around
The A/P GA mode requires dual A/P operation and is available after FLARE
armed is annunciated and prior to the A/P sensing touchdown.
With the first push of either TO/GA switch:
• A/T (if armed) engages in GA and the A/T Engaged Mode annunciation
on the FMA indicates GA
• thrust advances toward the reduced go–around N1 to produce 1000 to
2000 fpm rate of climb
• pitch mode engages in TO/GA and the Pitch Engaged Mode
annunciation on the FMA indicates TO/GA
• F/D pitch commands 15 degrees nose up until reaching programmed
rate of climb. F/D pitch then commands target airspeed for each flap
setting based on maximum takeoff weight calculations
• F/D roll commands hold current ground track at or below 400 feet RA.
Above 400 feet RA LNAV will engage. The Roll Mode annunciation
will display LNAV armed at or below 400 feet RA and LNAV engaged
above 400 feet RA.
• the IAS/Mach display blanks
• the command airspeed cursor automatically moves to a target airspeed
for the existing flap position based on maximum takeoff weight
calculations.
1B401, 1B402, 1B786 - 1B824
If the TO/GA switch is pressed after touchdown and prior to A/T disengagement,
A/P disengages and the A/T may command GA thrust.
1B785, 1J585 - 1J594
During a LAND 3, LAND 3 fail-operational (as installed), or LAND 2 fail-passive
landing with LAND 3 or LAND 2 annunciated, pressing TO/GA switch after
touchdown or activating the manual electric trim will be ignored by both autopilot
channels, both flight directors, and the autothrottle system. This ensures that
inadvertent press of the TO/GA switch does not affect rollout.
With the second push of either TO/GA switch after A/T reaches reduced
go–around thrust, the A/T advances to the full go–around N1 limit.
March 1, 2021
