Piper SENECA III - Page 393

PIPER
AIRCRAFT
CORPORATlON
SECTION
9
PA-34-220T, SENECA
III
SUPPLEMENT
21
The
Century 3l is
activated with the
aircraft
master
switch
and
operates
in
a
low
power
state
until
the
autopilot
is
engaged.
Mode
selection
is
made
by
pushing
the
desired
mode
switch
on
the
mode
programmer.
The
selected
mode
will
illuminate
on
the
annunciator
panel
The
annunciator
panel
contains
an
ambient
light
level
sensor
which
will
automatically dim the
annunciator light
level during
night
operations.
The
programmer
contains mode recognition
lights
and
dimming is
provided
by
the
panel
Ught
dimmer
switch.
The
electric
elevator
trim
system
is
a
fully
redundant
type
in
both
the
manual
and
autotrim
modes.
The trim
system
is
powered
througha
separate
system
master
switch
that
must
be
"ON"
during
autopilot
operations,
and
for
the control
wheel
trim command
switch
to
function
when theautopilot
is OFF.
WARNING
Several
comments
are
made throughout
this
supplement about
warnings
being flashed
in
NAV
APR
REV
and
GS
modes
in
the
event
valid
NAV
or
GS
signal
is
lost.
This is
true
only
if
the
aircraft is
equipped with navigation
and
glide
slope
receivers
that
have
external
warning
flag pickoffs.
Pilot
should
monitor
raw
data
at
all
time
to
insure flight
safety
when
the
autopilot
is
engaged.
ISSUED:
FEBRUARY
10,
1984
REPORT:
VB-Il10
9 of 20,
9-143