Section 3 In-Flight Procedures
2nd Ed Aug 2019
S-TEC 3100 Digital and Analog
3-16
If an altitude target is active, the aircraft automatically levels off and holds
at the selected altitude target (§ 3.8.5).
NOTE:
During a climb, if the commanded VS exceeds the actual VS by 300
fpm for a period of 10 seconds,
VS
flashes as an alert to the potential
for an impending stall condition. In this event, immediately increase the
aircraft’s thrust if possible, reduce the commanded VS with
, or both,
until
VS
stops flashing.
3.8.4.
Altitude Hold (ALT HOLD) Mode
ALT HOLD mode is engaged either by pressing
or automatically if an
altitude target has been reached from altitude pre-select.
Subsequent modification of the altitude
target does not change ALT HOLD
mode. The 3100 holds the aircraft at the
captured altitude. Press
or
to increase or decrease captured
altitude. A single press changes the altitude by 20 ft. Range is ±500 ft. from
the original captured altitude.
Figure 3-12:
Altitude Hold (ALT HOLD) Mode
NOTE:
When the aircraft has entered ALT HOLD mode and then subsequently
exceeds a distance of ±200 ft. from the captured altitude, the audible
alert, “Check Altitude,” sounds.
3.8.5. Altitude Pre-Select
Figure 3-13: Altitude Pre-Select
The altitude pre-select function allows for pre-selection of a target altitude
and the speed (if within the aircraft’s capabilities) or pitch angle at which
the aircraft climbs or descends until the altitude is automatically captured.
Audible alerts and voice alerts sound at 1000 ft. and 200 ft. from the target
altitude. “One Thousand to Go” and “Two Hundred to Go,” respectively.
