BOMBARDIER BD-100-1A10, Operating Manual

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FLIGHT INSTRUMENTS
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6
11-01-09
PRIMARY FLIGHT DISPLAYS (Cont)
ALTITUDE DISPLAY (Cont)
PRESELECTED ALTITUDE
The preselected altitude bug and digital readouts are set by using the ALT knob on the FGP. The preselect altitude is a ref-
erence for the altitude alert and autopilot systems. If the spring operated ALT knob is pushed, the preselect altitude incre-
ments are 100 feet or 10 meters. If the ALT knob is in the normal out position, the preselect altitude increments are 1000
feet or 100 meters. If a hundred foot value has been previously set, this will be reset to the next higher/lower thousands
value with the first rotation of the knob.
When BARO MIN is ON, the preselect altitude can be set at the value of BARO MIN. Rotating the knob one click coun-
terclockwise from the closest thousand food increment above the baro minimums will result in the altitude preselect being
set at the exact baro minimums. this allows leveling off at the exact non-precision approach minimums using the flight di-
rector or autopilot on approach.
The cyan preselect altitude readout is displayed above the altitude tape and has a selection range of -1000 feet to 45 000
feet in increments of 100 feet.
The range of the metric preselect altitude is from -300 meters to 17 000 meters.
ALTITUDE ALERT MODES
The altitude alert functions in the acquisition, deviation, and tracking modes.
The preselect altitude bug will change color and flash when the altitude acquisition and deviation parameters are exceeded.
Aural alerts accompany the visual alerts for acquisition and deviation modes.
Pressing the ALT knob will cancel an altitude alert if active.
ACQUISITION MODE
Both preselect altitude bugs flash cyan and an aural “C-chord” tone is heard when the aircraft altitude is 1000 feet above
or below the preselected altitude.
DEVIATION MODE
When an altitude deviation of 200 feet or more above or below the selected altitude occurs, both preselect indicators flash
amber and the “C-chord” tone is heard.
TRACKING
Monitoring of the preselected altitude tracking is a function of the ADCs.
VERTICAL NAVIGATION
When vertical navigation is selected (VNAV), the following are displayed:
- FMS reference altitude
- Vertical deviation and scale
- Suggested vertical speed (circular bug)
VERTICAL SPEED FIELD
The vertical speed (VS) display consists of a vertical analog scale and pointer with a green “drag line”. A part-time digital
readout of the vertical speed is also provided. The VS pointer moves up and down the scale to indicate current VS. As the
pointer moves, the drag line appears to emphasize the VS.
The vertical speed scale has a range of ± 4000 fpm. A part-time digital readout of the vertical speed is displayed on either
the top or bottom of the vertical speed scale respective of climb or descent.
Selected VS shows on the VS scale as a reference bug, and as a digital readout on the automatic flight control system
(AFCS) mode field above the attitude ball.