BOMBARDIER BD-100-1A10, Руководство по эксплуатации

Страница: 161 / 544

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 pro-
vides 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 auto-
matically 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
setting. A green TO message is displayed in the active vertical field. This mode generates a pitch up command that is cal-
culated when the pilot enters V
2
and V
R
values in the REFS 1/3 page or via the FMS TAKEOFF REF page. Loss of an
engine reduces the pitch up command appropriately. If V
2
and V
R
are not entered when the TOGA switch is pushed, the
command bars are removed from the display.
GO-AROUND MODE (GA)
Go-around (GA) mode is selected by pushing one of throttle-mounted TOGA buttons while airborne. Selection of GA
mode turns on both flight directors, disengages the autopilot (but not the yaw damper), clears all other vertical modes (ex-
cept overspeed), and switches the flight guidance commands to a dual-independent configuration.
This mode is cleared by:
- Turning off the flight directors
- Engaging the autopilot
- Selecting another vertical mode
- Pressing AP/FD SYNC button
- Rotating the UP/DOWN wheel, which selects Pitch Hold
The GA Mode generates a 10
°
pitch up command.
This mode is annunciated by a green GA in the lateral and vertical capture field.
REV 1