737 Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
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D6-27370-866-EGP 11.31.37
Go-Around
Below 2000 feet radio altitude, the FMC transitions to go-around logic from
approach logic when any of the following events occur:
• pushing either TO/GA switch while in a descent
• executing a direct-to waypoint in the missed approach (other than the
missed approach point)
• automatically while in a descent and the last waypoint of the approach
cycles to the first waypoint of the missed approach.
• the airplane climbs at a vertical speed greater than 600 fpm and the flaps
are retracted from a landing setting toward a flap setting of 15 or 1
Once the FMC go-around logic is established:
• the FMC transitions from active descent to active climb
• the thrust limit changes to go-around thrust
• all descent altitude constraints below the current airplane altitude are
deleted and replaced with predicted altitudes
• the original destination airport (airport from which the go-around was
just initiated) becomes the new origin airport allowing SID selection if a
diversion to another airport is required.
Note: LNAV may be engaged when the airplane climbs above 400 feet radio
altitude, but VNAV should not be engaged until after flap retraction.
If the go-around was initiated by pushing a TO/GA switch or selection of
go-around thrust, the CRZ ALT will change to the highest of:
• the highest constraint in the missed approach
• 1500 feet above airport elevation
• the MCP altitude.
Note: If the MCP altitude is the lowest of the three, the autopilot, if engaged, will
level off at the MCP altitude.
If the go-around was initiated by direct-to or waypoint sequencing, the CRZ ALT
will change to the highest of:
• the highest constraint in the missed approach
• 1500 feet above airport elevation.
Refer to section NP21.xx, Go-Around Procedure and section 4.20, Go-Around for
additional information.
September 15, 2016
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