Piper SENECA III - Page 398

SECTION
9
PIPER
AIRCRAFT
CORPORATION
SUPPLEMENT
21
PA-34-220T,
SENECA
III
NOTE
ff
radio
information
becomes
invalid
(Flag)
after
initiation
of
a
selected
angle
intercept the
applicable
navigation
mode
annunciator
will
flash
and
the
autopilot
will
remain
in H DG
mode.
The
automatic
mode
shift
to
the
invalid
radio mode
will
not
occur.
(3)
CWS
Mode
-
The
system
is
equipped
with
a
control
wheel
steering
switch
on
the
pilot's
control wheel.
When
depressed
and
held,
this
switch
will
disengage
the
autopilot.roll
and
pitch
servos
to
allow
manual
aircraft
maneuvering. When
released,
the
servos
will
re-engage
with the
lateral
(roll)
mode
previously
in
use
activated.
The
pitch
mode
previously engaged
will
remain
programmed in
the
following
condition:
a.
ALT
Mode
-
if
ALT
mode
had been
in
use,
the
ALT
mode
will
synchronize
at
the
new
pressure
altitude
existing
at
release
of the
CWS
switch
b.
ATT
Mode
-
If
the
ATT
mode
had
been
in
use.
the
system
will
synchronize
with
the
aircraft
attitude
existing
at
release
of
the
switch.
(4)
System
Test
(Ground
Operations Only)
-
The
system
is
equipped
with
a
comprehensive
test
circuit
which,
when
activated.
will
test
the
failure
monitor
circuits
and
all the
annunciator
lamps.
Activation
of
the
TEST
switch
willinitiate
the
system
test
only
when
the
autopilot is
NOT
engaged.
When
autopilot
is
engaged,
activation
of the
TEST
switch
will
test
the
annunciator lamps.
If the
autopilot
is
engaged
during
the
test
sequence,
the
sequence
will
terminate
immediatdy.
Refer
to
Section
4
for
tests
required
before
the
first
flight
of
each
day.
(5)
Warning
System
and
interlocks
-
The Century
31 System
includes
a
number
of
automatic
interlocks
that
will
prevent
system
operation
or
individual
mode
operation
if
the
input
information
is
not
valid
or
if
other
prerequisite
conditions
do
not
exist.
In
addition
to
the
interlocks.
the
system
will
annunciate
various
failure
conditions
as
advisory
information
for
the
pilot.
Following
is
a
brief
description
of
the
interlocks
and
warnings
provided.
REPORT:
VB-1110
ISSUED:
FEBRUARY
10,
1984
I
9-148,
14
of
20