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directors operate in dual independent mode.
The autopilot will disengage whenever a TOGA button is
pressed on the ground or in-flight.The autopilot visual and aural
disengage warnings may be canceled by pushing either TOGA
button again, or by pushing any AP/SP DISC switch.
With Takeoff mode selected, the heading reference is continuously set to the current
aircraft heading while maneuvering on the ground. After lift-off (weight off wheels),
the takeoff mode generates a heading hold command, with a 5-degree bank limit, using
the heading which existed at the moment of lift-off. These heading references are
independent of the HDG bug.
Takeoff lateral mode is cleared by selecting another lateral mode.
Lateral Takeoff Mode
Figure 4-26
NOTE
7000
5000 1.0
10
10
MDA
A
A
TO
A
DR TO
ALTS
YD
2500M 4
4
2
2
1
1
200
29.92 IN
P604_04_049
0 FT
60
40
VT 158
V2 139
VR124
V1 120
0
200
300
000
100
2
1
100
AUTOMATIC FLIGHT CONTROL SYSTEM
4-34 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
Lateral Go-Around Mode
In the air, pushing either TOGA (Takeoff/Go-Around) button mounted on the thrust
levers selects the Go-Around mode and clears all other lateral modes. Lateral and
vertical go-around mode (GA) selections are coincident. When Go-Around mode is
active, a green GA appears in the active lateral field of the FMA. During go-around
mode, the flight directors operate in dual independent mode.
The autopilot will disengage whenever a TOGA button is
pressed on the ground or in-flight. The autopilot visual and aural
disengage warnings may be canceled by pushing either TOGA
button again, or by pushing any AP/SP DISC switch.
The lateral component of Go-Around mode (GA) generates commands to maintain the
heading that existed at the moment of GA mode activation. Go-Around mode
generates a heading hold command with a 5-degree bank limit. This heading reference
is independent of the HDG bug.
Go-Around mode is cleared by selecting another lateral mode.
Lateral Go-Around Mode
Figure 4-27
NOTE
7000
5000 1.0
10
20
A
A
GA
A
DR GA
A
AP
2500M 4
4
2
2
1
1
M.456
200
160 T
2
140
170
180
2
100
200
900
800
000
29.92 IN
P604_04_050
1850 FT
AUTOMATIC FLIGHT CONTROL SYSTEM
For Training Purposes Only
Sept 04
4-35
P I LOT T R A I N I N G GU I D E
Flight Director Vertical Modes
There are nine vertical flight director modes (bold letters refer to the Flight Control
Panel button selections):
• Pitch
• Altitude Preselect
• Altitude Hold (ALT)
• Vertical Speed (VS)
• Flight Level Change (FLC)
• Takeoff
• Go-Around
• Glideslope
• FMS Vertical Navigation (VNAV)
Vertical modes are armed or activated by the FCP pushbuttons, a pitch wheel on the
Flight Control Panel, or by TOGA switches on the thrust levers. In general, disabling
the active vertical mode is accomplished by reselecting the active FCP pushbutton or
by selecting another vertical mode.
AUTOMATIC FLIGHT CONTROL SYSTEM
4-36 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
Pitch Mode
Pitch mode (PTCH) is the basic vertical operating mode, and is automatically selected
when no other vertical mode is active and the flight director is on. A green PTCH
annunciation appears in the vertical active field of the FMA when pitch mode is active.
When PTCH mode is active, the FCC generates commands to maintain the aircraft's
pitch angle reference. The pitch angle reference value may be adjusted by rotating the
VS/Pitch wheel on the FCP in the desired direction. Each click of the wheel results in
0.5 degrees of pitch attitude change.
All flight director vertical modes reset to PTCH mode when the
VS/Pitch Wheel is rotated, except if Vertical Speed (VS) or
glideslope capture (GS) modes are active. VS/Pitch wheel
rotation has no effect after glideslope capture.
The pilot may also adjust the pitch reference to a desired pitch angle by pushing the
FD SYNC button and manually setting a pitch angle between +20 to -10 degrees. If the
pilot selects a pitch angle greater than the maximum limits, the FD will generate
commands to return the pitch angle to within limit upon release of the FD SYNC
　
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