Piper SENECA III - Page 269

PIPER
AIRCRAFT
CORPORATION
SECTION 9
PA-34-220T, SENECA
III
SUPPLEMENT
4
monitored
on
Autotrim
only.
The TRIM
warning light should
flash
at
least
4
but
not
more
than
six
times
and the
audible
warning
sounds
when the
test
switch
on
the
Mode
Controller
is
depressed.
GS
-
The
Glide Slope
valid
(GS
pointer
being
in
view
on
PNI) has
to
be
present
before
GS
may
couple.
If
after
GS
coupled.the
valid
is
lost,
the
system
will
flash
the
GS
Annunciator
and transfer
from
GS
coupled
to
PAH
with the
FDl
pitch
command
bar providing pitch
attitude
steering
information. If
the
GS
valid
returns,
the
system
will
revert
back
to
GS.
NAV
FLAG- The
NAVorAPPR
Modes(ARM
or
CPLD)maybe
selected
and
will
function with
or
without
a
NAV
warning
flag
present.
The
FDI
bank
steering will
continue
to
provide
steering
information
with
or
without
a
valid
NAV
signal.
AP
DISCONNECT ALERT
-
The
Autopilot
Disconnect
Alert
will
sound
an
audible
warning
for
approximately
2
seconds whenever
the
autopilot
engage
lever
on
the
KC 290 Mode Controller is
disengaged.
(e)
PlLOT'S
CONTROL WHEEL
SWITCH
FUNCTIONS
AP
DISC
TRIM
INTERRUPT
-
This
emergency
disconnect
switch
will
disengage
the AP,
interrupt the
power
to
the
electric
trim
system,
and
disconnect
all
FD
Modes.
To
resume
APcontrol,
a
FD
Mode
and
the
AP lever
on
the Mode
Controller
must
be
re-engaged.
ln
the
event
of
electric
trim
or
autotrim
failure,
the
switch
can
be
held
depressed,
which
removes
all
power
from.
the
trim
system to
allow
the
pilot time
to turn
off
the
RADIO POWER
switch
and pull
the
(PlTCH TRlM)
circuit
breaker.
CWS
-
This.switch
when
depressed
and
held will allow
the
pilot
to
manually
fly the
airplane
without
disengaging
the AP.
When the
switch is
released
the AP
will
resume
control,
(within
the pitch
and
roll
attitude
limits).
The
CWS
switch
will
resync
the FD
in
PAH,
or
ALT
hold
and
will
transfer
the
GA
mode
to
PAH.
When
the
CWS
is
held
depressed,
Manual
Electric Trim
may
be
operated
without
disengaging
the AP.
ISSUED:
APRIL
21,
1981
REPORT:
VB-1110
7 of 16, 9-25