User manual

Page 60
Aircraft Operation Manual
Piper Cheyenne I, IA, II, IIXL
For ight simulation use only
4. The Altitude „ALERT” annunciator in the KAS 297 will illuminate 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 com-
mand will automatically guide the pilot through it at a low rate. As the aircraft
reaches the selected altitude, ALT HOLD will automatically engage, „ALT HOLD”
will light on the Annunciator Panel and „ALT ARM” will disappear. The command
bars on the FCI will call for level ight at the selected altitude. If autopilot is en-
gaged, 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 enga-
ged, 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 the aircraft altitude to match resetting
of the altimeter, or to make short descent segments during a nonprecision ap-
proach.
The ALT HOLD mode is cancelled by automatic Glideslope capture or selection of
ALT ARM, or GO-AROUND modes, or selection of FLT DIR to OFF.