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- Turning the altitude preselect knob
- If VNAV is deselected, pitch shall be selected as the active mode
Deselecting of ALTS track will occur due to any of the following:
- Turning off the FD while AP is disengaged
- Turning the altitude preselect knob when the VNAV altitude is not the same as preselected altitude being tracked;
Altitude hold will be automatically selected as the active mode
- A change of the FMS flight plan target altitude if the VNAV altitude is target; altitude hold is automatically
selected as the active mode
- If ALTS is tracking the flight plan target altitude and VNAV is deselected, altitude hold shall be the active mode.
- Activation of Vertical APPR Capture/Track states
- Selection of any other active vertical mode
Altitude select mode generates commands to capture and track selected altitude displayed on the PFD. During the altitude
capture maneuver, or after being established on the selected altitude (altitude track), if the selected altitude is changed, the
altitude hold mode is automatically selected. A deselection of vertical navigation mode, while capturing/tracking an FMS
altitude, will also select altitude hold mode. In addition to altitude preselect being set with the altitude preselect knob, a
FMS flight path target altitude can be programmed for use with VNAV. In the VNAV glide path capture mode, capturing
the preselected altitude is prohibited.
AUTOMATIC FLIGHT CONTROL SYSTEM
Volume 2 Flight Crew Operating Manual May 06/2005
04-01-16 CSP 100-6 REV 2
FLIGHT DIRECTOR VERTICAL MODES (Cont)
When the closest altitude being approached is the preselected altitude, altitude preselect is annunciated on the PFD in one
of the following ways:
- ALTS in white color in the vertical arm field — arm
- ALTS CAP in green color in the vertical capture field — capture
- ALTS in green color in the vertical capture field — track
When the closest altitude being approached is the FMS altitude, altitude select is annunciated on the PFD in one of the
following ways:
- ALTV in white color in the vertical arm field — arm
- ALTV CAP in green color in the vertical capture field — capture
- ALTV in green color in the vertical capture field — track
00
IAS 225
M
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.38
4200
4
2
1
1
4
350 16000
350 00
4
3
100
00
00
2
29.92 IN
.46
UTC
° C
11 : 42
SAT -15
ISA -5 ° C
20
10
ALTS AP YD VS 2000
.46
1
.5
00
80
20
352
20
10
AUTOMATIC FLIGHT CONTROL SYSTEM
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 04-01-17
FLIGHT DIRECTOR VERTICAL MODES (Cont)
ALTITUDE ALERT SYSTEM
The altitude alert system provides aural and visual indications of the preselected altitude capture and tracking. It also provides
audio and visual indications of altitude deviation from the preselected altitude.
The altitude alerting system processes data from the ADCs and is independent of the flight director or autopilot modes.
At approximately 1000 feet prior to the preselected altitude, an aural tone and flashing altitude preselect digits advises the
pilot of impending level off. If the flight director is tracking a preselected altitude and the aircraft subsequently deviates
more than 200 feet from the selected altitude, the altitude bugs flashes and a series of tones are produced.
If the aircraft continues to deviate uncorrected, at ± 1000 ft. from the selected altitude, the altitude bugs and digital readout
flash amber and audible tones are produced.
(ALT) MODE
Selection of Altitude Hold Mode occurs due to one of the following:
- Pressing the ALT button on the FGP, except that ALT HOLD is inhibited when in glideslope capture
- If VNAV has been selected, the FMS may select the altitude hold mode
- Altitude PreSelect is changed during ALTS track state
- While in ALTS track, a change of the FMS VNAV altitude if the VNAV altitude is the target. Altitude Hold is automatically
selected as the active mode
Altitude Hold Mode can be deselected, as follows:
- Turning Off the Flight Directors, while the AP is disengaged
- Another active vertical mode is selected
- If VNAV has been selected, the FMS may select another active vertical mode
- Another vertical mode is automatically captured, becoming the active mode
- The ALT mode button on FGP is pressed
- Changing coupled side
This mode is annunciated by a green ALT in the vertical capture field.
TAKEOFF MODE
Prior to takeoff, the vertical takeoff mode is selected when either TOGA switch is pressed and the flaps are set to a takeoff
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