Piper CHEROKEE ARCHER II Pilot Operating Handbook page 369

The following tables list the available AFCS vertical and lateral modes with their corresponding controls and
annunciations. The UP/DN wheel can be used to change the vertical mode reference while operating in Pitch
Hold, Vertical Speed, Altitude Hold, or IAS mode. Increments of change and maximum ranges of values for
each of these references using the UP/DN wheel are also listed in the table.
Vertical Mode Control
Pitch Hold (default)
Selected Altitude
Capture
Altitude Hold ALT Key
Vertical Speed VS Key
IAS Hold IAS Key
Vertical Path
VNV Key
Tracking (VNAV)
VNAV Target
Altitude Capture
Glidepath
APR Key
Glideslope
Takeoff or Go
GA Button
Around
Level (LVL) LVL Key
ESP High Pitch
Engagement
ESP Low Pitch
Engagement
ESP High
Airspeed
Engagement
ESP Low
Airspeed
Engagement
* ALTS arms automatically when PIT, VS, IAS, or GA is active.
** ALTV arms automatically if the VNAV Target Altitude is to be captured instead of the Selected
Altitude.
190-02291-07 Rev. 4
AFCS VERTICAL MODES
Annunciation
PIT
* ALTS
ALT nnnnn
VS nnnn
IAS nnn
VNAV
** ALTV
GP
GS
TO or GA
LVL
Reference Range
20° Nose Up
15° Nose Down
-2000 to +2000
FPM
65 to 140 KIAS
75 to 160 MPH
7°
Zero Vertical
Speed
ESP High Pitch Attitude engages at 20° nose up
ESP Low Pitch Attitude engages at 15° nose
down
ESP High Airspeed engages at above V
KIAS (1 MPH)
When above 200 FT AGL, ESP Low Airspeed
engages at below Vs + 5 KIAS (5 MPH). (This
mode only available if height above terrain is
available from a compatible Garmin GPS).
AFMS – GFC 500 Autopilot in Piper PA-28 Series
Reference Change
Increment
0.5°
10 FT
100 FPM
1 KT
1 MPH
+ 1
NE
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