Piper ARCHER III Pilot Operating Handbook page 226

SECTION
7
DESCRIPTION
&
OPERATION PA-28-181.
ARCHER
III
Autopilot (Optional)
(continued)
AUTOPILOT
FEATURES (continued)
Level Mode
(Optional)
Level Mode commands the airplane
to wings level and zero
vertical
speed.
It
is
activated
by
pressing the
blue switch (labeled
LVL)
at the top center
of
the
instrument panel. Level Mode may
be activated
at
anytime
with
the autopilot
engaged
or
disengaged.
Activation is
indicated
by
green
LVL
and
LVL
for
lateral
and
vertical
modes
respectively.
Level
mode should not
be
relied upon
if
the
autopilot is operating
in
any
failure condition.
Electronic Stability
and
Protection
(Optional)
Electronic Stability
and Protection (ESP) provides a control
force feedback to
deter the
pilot from
operating outside a
defined
envelope. ESP
functions only
when the
autopilot
is operable,
but
is
disengaged. As
the
aircraft
approaches the
defined operating
limits,
the
autopilot
servos
automatically
engage
to
nudge the
aircraft back to
the
nominal operating
envelope.
The
pilot
can
easily overpower
the
restoring tendency, and may interrupt ESP
with
the
AP
disconnect or
CWS
switches.
At
any
time
(usually for
training
reasons), the ESP function
may be
disabled
from
the
AUX -
SYSTEM
SETTINGS
page
on
the MFD.
When disabled
in
this manner, ESP OFF
is
displayed. ESP
will
automatically
re-enable
after
each
electrical power cycle.
If
ESP has
failed, an ESP
FAIL
I
system
message
will
be
displayed under the Messages
softkey
on the PFD.
REPORT:
VB-2749
7-42
ISSUED: December 22,
2017
REVISED: August
29,
2Ol9