.  
ALT ACQ is inhibited

.  
A/P disengage lights illuminate steady red

.  
pitch remains in TO/GA.

Note:  To extinguish A/P disengage lights, disengage A/Ps or select higher altitude on MCP
F/D Go–Around
If both A/Ps are not engaged, a manual F/D only go–around is available under the following conditions:
.  
Inflight below 2000 feet RA

.  
Not in takeoff mode.

With the first push of either TO/GA switch:
.  
A/T (if armed) engages in GA and advances thrust toward the reduced
go–around N1 to produce 1000 to 2000 fpm rate of climb. The A/T
Engaged Mode annunciation on the FMA indicates GA

.  
Autopilot (if engaged) disengages

.  
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 maneuvering speed for each flap
setting based on maximum weight calculations

.  
F/D roll commands approach ground track at time of engagement. The
Roll Engaged Mode annunciation on the FMA is blank

Automatic Flight -System Description 737 Operations Manual

.  
The IAS/Mach display blanks

.  
The airspeed cursor displays maneuvering speed for existing flap setting
based on maximum weight calculations.

With the second push of either TO/GA switch (if A/T engaged and after A/T reaches reduced go–around thrust:
.  The A/T advances to the full go–around N1 limit
TO/GA mode termination from F/D go–around:
.  
Below 400 feet RA, both F/D switches must be turned off.

.  
Above 400 feet RA, select a different pitch or roll mode.

.  
If the roll mode is changed first:

.  
F/D roll engages in the selected mode

.  
the F/D pitch mode remains in TO/GA.

.  
If the pitch mode is changed first:

.  
the F/D roll mode automatically changes to HDG SEL

.  
F/D pitch engages in the selected mode.

.  
The A/T GA mode (if engaged) is terminated when:

.  
another pitch mode is selected

.  
ALT ACQ annunciates engaged.

Note:  Engaging an A/P in CMD automatically engages the A/P and F/Ds in LVL CHG for pitch and HDG SEL for roll.
Single Engine F/D Go–Around
With a push of either TO/GA switch:
.  
F/D roll commands hold current ground track. The Roll Engaged Mode
annunciation on the FMA is blank

.  
Pitch mode engages in TO/GA and the Pitch Engaged Mode annunciation
on the FMA indicates TO/GA

.  
The F/D target speed is displayed on IAS/Mach display

.  
The F/D target speed is displayed on the airspeed cursor

.  
F/D pitch commands 13 degrees nose up. As climb rate increases, F/D
pitch commands maintain a target speed.

.  
If engine failure occurs prior to go–around engagement, then F/D target speed is the selected MCP speed.

.  
If engine failure occurs after go–around engagement, then F/D target speed depends on whether ten seconds have elapsed since go–around engagement:

.  
If prior to ten seconds, the MCP selected approach speed becomes target speed

.  
If after ten seconds and the airspeed at engine failure is within five knots of the go–around engagement speed, the airspeed that existed at go–around engagement becomes target speed

Copyright . The Boeing Company. See title page for details.
4.20.22   December 1, 2000

Automatic Flight -System Description 737 Operations Manual
.  If after ten seconds and the airspeed at engine failure is more than five knots above go–around engagement speed, then the current airspeed becomes target speed.
Note:  The target speed is never less than V2 speed based on flap position unless in windshear conditions.
F/D commanded acceleration cannot occur until a higher speed is selected on the MCP IAS/Mach display.
Automatic Flight Go–Around Profile
ALT HLD
MCP SPD
LNAV
CMD
MCP SPD
LNAV
CMD
ALT ACQ
GA
LNAV
CMD
TO/GA

Missed Approach altitude
. Pitch mode
engages in
ALT HLD
　
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本文鏈接地址：737-300機(jī)組操作手冊(cè)Flight Crew Operations Manual FCOM 2(36)