Section 3 In-Flight Procedures
2nd Ed Aug 2019
S-TEC 3100 Digital and Analog
3-14
5) Lateral mode transitions to APR
GPSL
and tracks GPS lateral deviations
when the CDI <1 dot (50%).
6) Vertical mode transitions to GPSV
and tracks GPS vertical deviations
when the GDI <1 dot (50%).
7) At the DH or MAP, disconnect AP to execute either a manual landing
or GA, respectively.
3.8.
VERTICAL MODES
All vertical modes may be selected by pressing the appropriate button on
the 3100 bezel. A second press of the engaged mode button deselects the
mode, and the 3100 reverts to the armed vertical mode or PITCH mode,
if there is no armed vertical mode. For example, if the active mode is VS,
press
to deselect HDG and engage PITCH.
Figure 3-9:
Pitch Attitude (PITCH) Mode
3.8.1.
Pitch Attitude (PITCH) Mode
PITCH mode is engaged when the current active vertical mode is deselected
or when FD or AP+FD is first engaged.
The 3100 holds the aircraft at its current (captured) pitch attitude. Press
to increase or
to decrease captured pitch attitude. A single press
changes the pitch attitude 0.25°.
If an altitude target is active, the aircraft automatically levels off and holds
at the selected altitude target (§ 3.8.5).
NOTE:
If the ROLL or PITCH mode was entered by pressing
or go-around
(GA), the altitude target is not captured.
