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If a missed approach is required following a dual autopilot approach with FLARE arm annunciated, leave the autopilots engaged. Push either TO/GA switch, call for flaps 15, ensure go-around thrust for the nominal climb rate is set and monitor autopilot performance. Retract the landing gear after a positive rate of climb is indicated on the altimeter.
At typical landing weights, actual thrust required for a normal go-around is usually considerably less than maximum go-around thrust. This provides a thrust margin for windshear or other situations requiring maximum thrust. If full thrust is desired after thrust for the nominal climb rate has been established, press TO/GA a second time.
If a missed approach is required following a single autopilot or manual instrument approach, or a visual approach, push either TO/GA switch, call for flaps 15, ensure/set go-around thrust, and rotate smoothly toward 15° pitch attitude. Then follow flight director commands and retract the landing gear after a positive rate of climb is indicated on the altimeter.
Note: For operators authorized to fly a normal approach using flaps 15, if a
go-around is required, select flaps 1. Limit bank angles to 15° until
reaching VREF 15 + 15 knots or minimum maneuvering speed.
During an automatic go-around initiated at 50 feet, approximately 30 feet of altitude is lost. If touchdown occurs after a go-around is initiated, the go-around continues. Observe that the autothrottles apply go-around thrust or manually apply go-around thrust as the airplane rotates to the go-around attitude.
Note: An automatic go-around cannot be initiated after touchdown.
The TO/GA pitch mode initially commands a go-around attitude and then transitions to speed as the rate of climb increases. Command speed automatically moves to a target airspeed for the existing flap position. The TO/GA roll mode maintains existing ground track. Above 400 feet AGL, select a roll mode as appropriate.
Copyright . The Boeing Company. See title page for details.
5.74 FCT 737 (TM) October 31, 2006

737 Flight Crew Training  Manual
The minimum altitude for flap retraction during a normal takeoff is not normally applicable to a missed approach procedure. However, obstacles in the missed approach flight path must be taken into consideration. During training, use 1,000 feet AGL to initiate acceleration for flap retraction, as during the takeoff procedure.
Note:  Selection of pitch and roll modes below 400 feet AGL does not change the autopilot and flight director modes.
Note:  When accomplishing a missed approach from a dual-autopilot approach,
initial selection of a pitch mode, or when altitude capture occurs above 400
feet AGL the autopilot reverts to single autopilot operation.
If initial maneuvering is required during the missed approach, accomplish the missed approach procedure through gear up before initiating the turn. Delay further flap retraction until initial maneuvering is complete and a safe altitude and appropriate speed are attained.
Command speed automatically increases to maneuvering speed for the existing flap position. Retract flaps on the normal flap/speed schedule. When the flaps are retracted to the desired position and the airspeed approaches maneuvering speed, select LVL CHG and ensure climb thrust is set. VNAV may be selected if the flaps are up. Verify the airplane levels off at selected altitude and proper speed is maintained.
If VNAV is used during go-around, the FMC missed approach profile should contain the appropriate holding speeds and altitudes. Before selecting VNAV, flaps should be retracted because VNAV does not provide overspeed protection for the leading edge devices. Speed intervention (as installed) may be used to further modify airspeed as needed. If VNAV ALT (as installed) is displayed, a premature level off may occur and selection of LVL CHG may be required to complete the climb to the missed approach altitude.
If a diversion to an alternate airport is required, delay use of VNAV until appropriate FMC entries are completed.
Note:  FMC speeds may not comply with speed/altitude restrictions when using VNAV at low altitudes.
Copyright . The Boeing Company. See title page for details.
October 31, 2006 FCT 737 (TM)  5.75

Low Altitude Level Off - Low Gross Weight
When accomplishing a low altitude level off following a go-around at a low gross weight, the crew should consider the following factors:
.  
if full go-around thrust is used, altitude capture can occur just after the
go-around is initiated due to the proximity of the level off altitude and the
high climb rate of the airplane

.  
the AFDS control laws limit F/D and autopilot pitch commands for
passenger comfort

.  
there may not be enough altitude below the intended level off altitude to
　
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