Learjet 60 - Pedestal Trim Control Panel (Figure 5-4); Rudder Trim Indicator; Rudder Trim Switch

Pilot's
Manual

Learjet 60
RUDDER TRIM
SWITCH
Yaw trim is pilot
controlled through the
RUDDER TRIM
switch locat-
ed on the pedestal
trim control panel
. The switch has three
positions :
NOSE
LEFT, OFF, and
NOSE RIGHT .
The switch knob is split
and
both
halves must be
rotated simultaneously
to initiate yaw
trim mo-
tion .
When the switch
is released, both
halves will return
to the center
OFF position .
Actuation of the
RUDDER TRIM switch to
NOSE LEFT
or
NOSE RIGHT
will signal the
yaw trim actuator to move
the rudder
trim tab in the
appropriate direction
.
RUDDER TRIM
INDICATOR
Rudder
trim tab
position indication is
provided by the
RUDDER
TRIM indicator
located on the center
instrument panel
. A semi-
circular scale and
pointer indicates the
direction (L or R) of yaw
trim .
The scale markings
represent increments
of rudder trim tab
travel .
The indicator
receives rudder trim
tab position inputs from a
poten-
tiometer in the
rudder trim actuator
. The indicator
operates on 28
VDC supplied
through the 2-amp
TRIM-FLAP-SPOILER
INDICA-
TOR circuit
breaker on the copilot's
circuit breaker panel .
The RUD-
DER TRIM
indicator will be operative
during the EMER BUS mode .
CONTROL WHEEL MASTER
SWITCHES - YAW TRIM
A Control Wheel Master Switch
(MSW) is located beneath the control
wheel
trim switch on the outboard
horn of each control wheel . In ad-
dition to the switches' other
functions, either Control Wheel Master
Switch (MSW), when
depressed, will inhibit yaw trim . The yaw
trim
is inhibited only as long as
the Control Wheel Master Switch (MSW)
is held .
5- 1 8
PEDESTAL TRIM CONTROL PANEL
Figure
5-4
PM-123
Change 2