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the altitude bugs and digital readout flash yellow, and an aural tone (C-chord) is heard.
Altitude alerts can be canceled by pushing the PUSH CANCEL inset of the ALT knob
or by selecting a new preselect altitude.
Altitude alerts are inhibited if the glideslope (GS) or FMS glide path (VGP) is
captured.
AUTOMATIC FLIGHT CONTROL SYSTEM
For Training Purposes Only
Sept 04
4-41
P I LOT T R A I N I N G GU I D E
Altitude Alert Annunciations
Figure 4-30
P604_04_028
+200 FT
–200 FT
–1000 FT
+1000 FT
PRESELECT ALT
Preselect
Altitude
Tracking
Deviation
from
Previously
Captured
3
000
4
2500M
31000
2
C-Chord
20 300 8000
R ALTS
ALTS
4
2500M
31000
20 300 8000
R ALTS
ALTS
4
2500M
31000
20 300 8000
R ALTS
ALTS
4
2500M
31000
ALTS CAP
ALTS
20 300 8000
R ALTS
ALTS
4
2500M
31000
20 300 8000
R FLC
ALTS
4
2500M
31000
CAP
ALTS
Preselect Altitude
Capture as Function
of Closure Rate
C-Chord
AUTOMATIC FLIGHT CONTROL SYSTEM
4-42 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
Altitude Hold Mode
Altitude Hold mode (ALT) generates commands to maintain the pressure altitude at
the time of selection. Altitude Hold mode commands are based on the baro-corrected
altitude of the coupled side barometric altimeter. When active, a green ALT
annunciation appears in the active vertical field of the flight mode annunciator.
Altitude Hold mode is activated by pushing the ALT button on the FCP or by changing
the preselected altitude while in altitude select track mode (ALTS active).
Altitude hold mode is inhibited whenever Glideslope (GS) mode is active.
If the ALT button on the FCP is pushed during a climb or
descent, it is possible for the aircraft to temporarily overshoot the
desired altitude while the FCCs compensate for the aircraft's
vertical speed at the moment of ALT mode selection.
The pilot may adjust the altitude reference by pushing the FD SYNC button and
manually flying to the desired altitude. The FD will generate commands to maintain
the new altitude reference upon release on the FD SYNC button.
Altitude Hold mode may be cleared by:
• pushing the ALT button
• selecting another vertical mode, or
• capturing an armed vertical mode
Altitude Hold Mode
Figure 4-31
NOTE
7000
20000 1.0
10
10
MDA
A
A
HDG
A
DR ALT
A
AP
2500M 4
4
2
2
1
1
M.454
280
240
220
250
260
10
100
200
900
800
000
29.92 IN
P604_04_061
AUTOMATIC FLIGHT CONTROL SYSTEM
For Training Purposes Only
Sept 04
4-43
P I LOT T R A I N I N G GU I D E
Vertical Speed Mode
The Vertical Speed mode (VS) generates commands to maintain a vertical speed
reference value.
Pushing the VS button on the FCP selects the vertical speed mode. A green VS
annunciation is displayed in the active vertical field of the FMA, and ALTS mode is
automatically armed to capture the preselected altitude.
The VS reference value will default to the existing vertical speed at the moment of
mode selection. The VS reference value will also reset to the existing vertical speed
whenever the autopilot is engaged and VS mode is active.
The VS reference may be changed by rotating the VS/Pitch wheel in the desired
direction. The VS reference changes by ± 100 fpm per click. The selected vertical
speed reference is displayed on the vertical speed scale as a magenta triangular bug,
and as a magenta digital readout above the scale.
The pilot may adjust the VS reference by pushing the FD SYNC button while
maneuvering the airplane to a new VS reference. The FD will generate commands to
maintain the new VS reference upon release of the FD SYNC button.
Vertical speed mode is cleared by:
• pushing the VS button on the FCP
• selecting another vertical mode, or
• capturing an armed vertical mode
Vertical Speed Mode
Figure 4-32
7000
12000 1.1
10
20
10
MDA
A A
A
HDG
LNV1
DR VS
ALTS
AP
2500M 4
4
2
2
1
1
M.464
280
240
220
250
260
10
900
700
　
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本文鏈接地址：CL_604-AUTOMATIC_FLIGHT_CONTROL_SYSTEM(16)