Piper SENECA III - Page 370

SECTION
9
.
PIPER
AIRCRAFT
CORPORATION
SUPPLEMENT 18
PA-34-220T,
SENECA
IH
Autotrim
-
Before
the
First Flíght
of
Each Day
(!)
Check
trim
master
switch
ON, autopilot OFF.
(2)
Press
and
hold TEST pushbutton
on
Mode
Annunciator.
Verify
the
following
sequence.
(Each
sequence
will
last
approximately
two
seconds):
a.
All
annunciations
light
with
FAIL
and
AP
flashing.
b.
Autotrim
flashes,
goes
steady,
then
flashes.
c.
All
lights
go
steady.
d.
After
three
to
five
seconds,
AUTOTRIM and
FAIL
flash
continually.
(3)
With
TEST button
on
the
Mode
Annunciator still depressed,
verify
Trim
will
not operate
in
either
direction
with the
Control
Wheel
Switch.
(4)
Release
TEST
pushbutton. All
lights
except
HDG
and
ATT
shall
extinguish.
Any
deviatíon from
the
above
sequence
indicates
that
a
failure
exists
in
either
the
primary
system
or
in
the
monitor
circuits.
The
autopilot
and
trim
system
shall
not
be
operated
until the
failure
has
been
identified and
corrected.
CAUTION
Recheck
trim
position prior
to
initiating
takeoff.
(d)
FLIGHT
DIRECTOR
(1)
Check
circuit
breaker
-
lN.
(2)
Flight
director
switch
on
steering horizon
-
ON.
(Adjacent
to
instrument
on
single
cue
horizon)
(3)
Pitch
modifier
DN-UP
-
check
pitch
steering
indicator
moves
appropriately.
(4)
HDG
bug
RT-LT
-
check
roll
steering.indicator
moves
appropriately.
REPORT:
VB-1110
ISSUED:
APRIL 21,
1981
9-120,
8
of
12
REVISED:
FEBRUARY
25,
1982