Piper SENECA III - Page 268

SECTION
9
PIPER AIRCRAFT
CORPORATION
SUPPLEMENT 4
PA-34-220T,
SENECA III
SECTION 4
-
NORMAL
PROCEDURES
(a)
The
BATTERY
switch
function
is unchanged
and
can
be used
in
an
emergency
to
shut
off
all
electrical
power
while the
problem is
isolated.
(b)
The
RADIO POWER
switch supplies
power
to
the avionics
bus bar
of the
radio
circuit breakers, AP and TRIM circuit
breakers.
(c)
The
KFC
200
is
controlled
by
the following
circuit
breakers:
AUTOPILOT
-
This suplies
power.to
the
FCS KC295 Computer,
KC 290 Mode Controller, KA
285 Annunciator Panel,
Kl
256
FDl,
and AP
Pitch and Roll Servos,
FCS
MASTER
-
This
in.conjunction
with
the
radio
power
switch
supplies
power
to
the
avionics
bus.
COMPASS SYSTEM
-
This supplies
power
to
the KCS 55A
Compass
System.
PITCH
TRIM
-
This supplies
power
to
the FCS
Autotrim
and
manual
electric trim
systems.
(d) FCS
WARNING FLAGS
AND ANNUNCIATORS
The
KI 256
Flight Director Indicator does
not
have
a
warning
flag,
however
the command
bars
will
be
biased
out
of
view
whenever
the
system
is invalid
or a
FD mode is
not
engaged.
HDG
-
This
warning flag
mounted
in
the
Pictorial Navigation
Indicator will be in
view
whenever
the
directional
gyro
information
is invalid.
If
a
HDG.invalid
occurs
with either
NAV, APPR,
or
HDG
modes
selected the AP and/or
FD.is
disengaged.
Basic
FD
mode
may
then be
re-engaged
along
with
any
vertical
mode
and
the
AP
re-engaged.
TRIM
-
The TRIM
warning
light,
located
in
the
lower
right
corner
of
the
annunciator
panel,
will
flash
and
be
accompanied
by
an
audible
warning
whenever
the
following
autotrimand/or
manual
electric
pitch trim
failures
occur.
The
Trim
servo
motor
running
without
a
command
is monitored
on
the manual electric
and
auto-
trim.
The
trim
servo
motor
not
running
when
commanded
to
run
and
the
trim
servo
motor
running
in the
wrong
direction
are
REPORTY
VB-1Il0
ISSUED:
APRIL
21,
1981
9-24,
6
of
16