Autopilot (Optional) - Piper ARCHER III Pilot Operating Handbook

SECTION
7
DESCRIPTION & OPERATION
PA.28.181.
ARCHER
III
Autopilot (Optionat) (continued)
Autopilot
Disengagement
Methods:
The autopilot can
be disengaged
manually
by the
following "normal"
methods
which
are
indicated by
a
yellow
flashing
AP
annunciation:
.
Pressing the
A/P
DISC
/
TRIM
INTER
switch
on the
control
wheel
.
Activation
of either half
or
both
halves
of the manual
electric pitch trim
switch
on the
control
wheel
.
Pressing the
AP
key
on the
MFD
.
Pressing the
TO/GA
switch on
the
throttle
(if
optional
Underspeed
Protection not installed)
The autopilot
can
be
disengaged
manually by the following
"abnormal"
methods
which
are
indicated by
a
red
flashing
AP
annunciation:
.
Pulling
the
AUTOPILOT or PITCH
TRIM
circuit
breaker
.
Activation
of
the stall
warning system
(if
optional
Underspeed
Protection not installed)
The autopilot
can
be
momentarily
disengaged
by
pressing and
holding
the
CWS
switch
on the
control
wheel.
The autopilot
will
disengage
automatically under the
following
conditions
which
are
indicated by
a
red
flashing
AP
annunciation:
.
Internal autopilot
system
failure
.
Total
AHRS failure
.
Total
ADC
failure
.
Inability
to compute default
flight
director
modes
After
any autopilot
disengagement,
the aural disconnect
alert can be
canceled
by pressing the
A,/P
DISC
switch or
manual
electric pitch trim
switches
AUTOPILOT
FEATURES
Overspeed Recovery Mode
Overspeed Recovery attempts
to prevent the aircraft from
exceeding
the
maximum
approved
autopilot operating
speed
by providing
a
flight
director
pitch up
command whenever the
airspeed
trend vector exceeds
140
KIAS.
If
flying
manually, the
pilot
may
follow the pitch up
commands,
or
if
engaged,
the autopilot
will
follow
the
command.
The pitch up
command
will
not
exceed that
for level flight; to
decelerate more
rapidly the pilot
should reduce engine power. When
Overspeed Recovery
is
active,
an
amber
MAXSPD is
displayed above the airspeed tape. Overspeed Recovery
REPORT:
YB-2749
7-40
ISSUED:
December 22, 2Ol7
REVISED: May 7,2018