Piper SENECA III - Page 284

SECTION 9
PIPER
AIRCRAFT
CORPORATION
SUPPLEMENT
5
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 KC 295
Computer,
KC 292
Mode
Controller, KA
285
Annunciator Panel,
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
Systern.
PITCH
TRIM
-
This
supplies
power
to
the
FCS Autotrim
and
manual
electric
trim
systems.
(d)
FCS
WARNING
FLAGS
AND
ANNUNCIATORS
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
is disengaged.
Éasic
AP mode
may
then
be
re-engaged
along
with
any
vertical
mode.
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
autotrim
and
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
ttim
servo
motor
not
running
when
commanded
to
run
and
the
trim
servo
motor
running
in
the
wrong
direction
are
monitored
on
Autotrint 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.
REPORTi
VB-1110
ISSUED:
APRIL
21,
1981
9238,
6
of
16