SPZ--8000 Digital Integrated Flight Control System
A28--1146--055
REV 2
Modes of Operation
8-46
The altitude hold mode is cancelled by:
D Moving the pitch wheel on the pitch turn controller
D Pushing the ALT button on the flight guidance controller
D Selecting any other vertical mode on, or captured
D Selecting go--around mode
D Selecting standby mode
D Coupling to the cross--side EHSI.
ALTITUDE PRESELECT MODE
The altitude preselect mode is used with another vertical mode to
automatically capture, flare and level off at a preselected altitude.
The altitude preselect mode automatically arms when the aircraft
climbs or descends toward the selected altitude. The ALT SEL knob on
the instrument remote controller sets the altitude. The selected altitude
is displayed in cyan the EADI ASEL box. The altitude preselect armed
mode is cancelled during altitude preselect capture, altitude hold, and
after glideslope capture.
The altitude preselect arm mode is not annunciated on the EADI.
Vertical speed hold, FLC, or pitch hold can be used to fly to the selected
altitude. When reaching the bracket altitude, the system automatically
switches to the altitude preselect capture mode, and cancels the
previous pitch mode. When the aircraft is at the bracket altitude, a
command is generated to capture the selected altitude.
Altitude preselect capture is annunciated as ASEL on the EADI in the
vertical capture annunciator location. To indicate the transition to
capture, ASEL flashes for 5 seconds.
The aircraft remains in the altitude preselect capture mode until the
following conditions exist simultaneously:
D Altitude preselect capture
D Altitude error is less than 25 feet
D Altitude rate is less than 5 feet/second.
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