User manual

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ALTITUDE SELECT (ALT ARM) Mode
This mode allows the pilot to select an altitude and, upon approaching
that selected altitude, obtain an automatic visual pitch command on
the FCI to capture and hold the preselected altitude. To operate in this
mode the pilot must:
Set the desired altitude into the „selected altitude” window of
the KAS 297 Altitude Selector.
Establish a climb or descent as appropriate.
Depress the ARM button on the Altitude Selector. This may
be done at any time during the climb or descent before the
selected altitude has been attained. „ALT ARM” will light on
the Annunciator Panel and on the Altitude Selector.
The Altitude „ALERT” annunciator in the KAS 297 will illumi-
nate and a two second aural tone will sound 1,000 ft. prior to
reaching selected altitude and will cancel at 300 ft. prior. An
aural tone will sound upon reaching altitude.
As the aircraft approaches the selected altitude, an „adaptive” pitch
rate command will automatically guide the pilot through it at a low
rate. As the aircraft reaches the selected altitude, ALT HOLD will auto-
matically engage, „ALT HOLD” will light on the Annunciator Panel and
„ALT ARM” will disappear. The command bars on the FCI will call for
level flight at the selected altitude. If autopilot is engaged, the system
will perform the required maneuvers.
ALT ARM is disengaged by depressing the ALT ARM button, by
engaging ALT HOLD, by GS capture, or selecting FLT DIR to OFF.
ALTITUDE HOLD (ALT HOLD) Mode
This mode will cause a computed visual pitch command on the FCI
command bars to hold the aircraft at the pressure altitude existing at
the time it was activated. The mode is activated either automatically by
the ALT ARM function, or manually by depressing the ALT button on
the Mode Controller. If the autopilot is engaged, it will automatically
hold the aircraft at that altitude.
The Vertical Trim switch may be used to adjust the selected altitude
up or down at a constant rate of approximately 600 fpm without
disengaging the mode. This enables the pilot to conveniently adjust
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