.  
engages pitch and roll modes in CWS. Other pitch and roll modes not
enabled

.
displays CWS P and CWS R in A/P status display

.
CMD not displayed in A/P Status display

.  
F/Ds, if ON, display guidance commands and FD annunciates in A/P
status display. A/P does not follow commands while in CWS

.
A/P pitch and roll controlled by pilot with control wheel pressure

.  
when control pressure released, A/P holds existing attitude. If aileron
pressure released with 6 degrees or less bank, the A/P rolls wings level
and holds existing heading. Heading hold feature inhibited:

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

Automatic Flight -Controls and Indicators 737 Operations Manual
.
below 1500 feet RA with gear down

.
after LOC capture in APP mode

.
after VOR capture with TAS 250 kts or less.

Master (MA) Flight Director Indicators (white letters)
If a F/D switch is ON, the light indicates which FCC is controlling the F/D modes.
.
Illuminated – related FCC is controlling F/D modes.

.
Extinguished – F/D modes are controlled from opposite FCC.

.
Both lights illuminated – each FCC is controlling modes for related F/D.

Flight Director (F/D) Switch
Left F/D switch activates command bars on Captain’s ADI. Right F/D switch activates command bars on First Officer’s ADI.
ON –
.
enables command bar display on related pilot’s ADI

.  
command bars are displayed if command pitch and/or roll modes are
engaged

.
displays FD in A/P status display if A/P is OFF or engaged in CWS
. on ground, arms pitch and roll modes for engagement in TO/GA and

HDG SEL or WINGS LEVEL (as installed) when TOGA switch is
pushed

.  
in flight with A/P ON and F/Ds OFF, turning a F/D switch ON engages
F/D in currently selected A/P modes.

OFF – Command bars retract from related pilot’s ADI.

Autopilot Disengage Bar
Push down –
.
disengages both autopilots

.
exposes yellow background

.
prevents autopilot engagement.

Lift up –
.
enables autopilot engagement

.
conceals yellow background.

Autopilot Engage Switch
Push –
Automatic Flight -Controls and Indicators 737 Operations Manual

CMD
.  
engages related autopilot in command mode (switch illuminates)

.  
enables all command modes for AFDS in addition to autopilot CWS
operation

.  
selecting second autopilot in CMD disengages first autopilot unless in
APP mode.

CWS
.  
engages related autopilot in control wheel steering mode (switch
illuminates)

.  
pitch and roll are controlled through application of control wheel and
column pressure

.  
if attitudes acquired exceed autopilot limits, autopilot returns to attitude limits when control pressure is released

.  
flight directors can be operated in command modes while an autopilot is engaged in CWS.

Autopilot / Autothrottle Controls

Autopilot Disengage Switch
Push –
.
disengages both autopilots

.
A/P disengage lights flash

.
A/P disengage warning tone sounds for a minimum of two seconds

.  
second push extinguishes disengage lights and silences disengage
warning tone

.  
if autopilot automatically disengages, extinguishes A/P Disengage lights and silences A/P warning tone.

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

Automatic Flight -Controls and Indicators 737 Operations Manual

Autothrottle Disengage Switches
Push –
.
disengages autothrottle

.
A/T disengage lights flash

.
A/T ARM switch trips OFF

.
second press extinguishes A/T disengage lights

.
extinguishes A/T disengage lights after automatic A/T disengagement.

Takeoff/Go–Around (TO/GA) Switches
Push – engages AFDS and A/T in takeoff or go–around mode if previously armed.
Autopilot / Autothrottle Indicators

Autopilot (A/P) Disengage Light
Illuminated (red) –
.
flashing – autopilot has disengaged (tone sounds)
　
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本文鏈接地址：737-300機組操作手冊Flight Crew Operations Manual FCOM 2(26)