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PILOT'S OPERATING HANDBOOK
SUPPLEMENT
ELECTRIC ELEV ATOR
TRIM SYSTEM
(MODEL T210)
SUPPLEMENT
ELECTRIC ELEVATOR
TRIM SYSTEM
(MODEL T210)
SECTION 1
GENERAL
The electric elevator trim system provides
a
simple method
of
reliev-
ing pitch
control
pressures without interrupting
other
control
operations
to adjust the manual elevator trim wheel. The
system
is controlled by a
slide-type trim switch on the top of the left control wheel grip,
a
disengage
switch
on
the left side of the control wheel pad
and a
switch
type circuit
breaker
on
the sidewall circuit breaker panel. Pushing the trim
switch
to
the
forward
position,
labeled DN, moves the elevator trim tab in
the "nose
down"
direction; conversely, pulling the switch
aft
to
the
UP position
moves the tab in the
"nose
up" direction. When the switch is
released,
it
automatically returns to the center off position,
and
elevator
trim
tab
motion stops. The disengage switch, labeled ELEC TRIM DISENGAGE
,
disables the system when placed
in
the DISENGAGE position. The
elevator
trim
circuit breaker is provided
as a
secondary
control of
all
electrical power to the system
and
can be pulled
out
in
case of
system
malfunction.
A servo unit (which includes
a
motor and chain-driven, solenoid-
operated clutch) actuates the trim tab to the selected
position.
When
the
clutch
is not energized (trim switch off) the
electric
portion of the trim
system freewheels so that manual operation is not affected.
The electric
trim system can be overridden
at any
time by manually rotating the
.elevator trim wheel, thus overriding the servo that drives the trim tab.
SECTION 2
LIMITATIONS
There is no change to the airplane limitations when this trim
system
is
installed. However, the following information is presented on a placard at
the bottom of the instrument panel:
Maximum
Altitude
Loss During
Electric Trim Malfunction - 250 ft.
1 of 2
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