Piper Turbo Saratoga PA-32-301T Pilot's Manual page 280

SECTION 9
PIPER AIRCRAFT
CORPORATION
SUPPLEMENTS
PA-32-301T,
TURBO SARATOGA
d. Grasp control wheel and override
roll and pitch servo
actuators
to assure override capability.
e.
Hold control yoke and
disengage autopilot
by
activating
the control wheel trim switch.
f. Check controls through full
travel in roll and pitch to
assure complete autopilot
disengagement.
g.
Retrim aircraft for takeoff.
(c)
TRIM
SYSTEM
The autopilot
is provided
with an electric elevator
trim system
having two modes of operation.
When
the
autopilot is engaged and
the trim master switch is ON, automatic
electric trim
(autotrim)
is
provided. When the autopilot is disengaged,
command electric
elevator trim is available by use of the control
wheel switch pro-
vided or by use of the primary
trim control wheel. The electric
elevator
trim
system
has been designed to withstand any type of
single
failure, either mechanical or electrical, without uncontrolled
operation resulting. The automated system self test circuit
pro-
vided, in conjunction with a functional check,
described
below, will
uncover
internal failures that otherwise could remain undetected
and thus compromise the fail-safe properties of the system. Proper
operation of the system is,
therefore, predicated on conducting
the
following preflight check before first flight of each
day.
If the
trim
system fails any portion of this test, turn
the autotrim
master switch
OFF
and pull the autotrim circuit breaker, until
the
system
is
corrected.
The command
electric trim switch on the left portion of the pilot's
control wheel has
two
functions:
(1)
When
the top
bar (AP OFF) is pressed, it disconnects
the
auto-
pilot.
(2)
When the top bar is
pressed
and the rocker is moved forward,
nose
down trim
will occur; when moved aft, nose up trim will
occur.
Command Trim
-
Before the First Flight of Each Day
(1)
Trim master switch
-
ON.
(2)
Verify normal trim UP and DOWN operation with control
wheel switch.
(3)
Press
-
center
bar
only
-
then release center
bar.
(4)
Push
rocker
fore
and aft
-
only. Trim should not operate with
either separate
action.
REPORT:
VB-1070 ISSUED:
OCTOBER
2, 1980
9-56