Learjet 60 - System Test Switch-Trim Overspeed Function; Trim Light

Pilot's Manual
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Learjet 60
T . O .
TRIM LIGHT
An amber
T . O . TRIM annunciator light,
located on the glareshield
an-
nunciator panel, is installed to
alert the crew that the PITCH
TRIM in-
dicator pointer is not
within the T . O . segment
when the aircraft is on
the ground .
The light will be
extinguished whenever the
indicator
pointer is set within the
T . O . segment . The light is disabled
during
flight operations .
SYSTEM TEST SWITCH-TRIM
OVERSPEED
FUNCTION
The
rotary-type SYSTEM TEST
switch, located on the
pilot's instru-
ment panel, is used to
test the trim speed
monitor . Prior to
beginning
the trim
speed monitor test, the
pitch trim must be set on
the high trim
rate (N UP) side of
the index ( 11110~ ) on the
PITCH TRIM indicator . The
monitor test
is initiated by rotating the
SYSTEM TEST switch to
TRIM
OVSP,
initiating primary pitch
trim through either
control wheel trim
switch, and then
depressing the switch
PRESS TEST button . When
the
PRESS
TEST button is depressed,
a false low trim
rate range horizon-
tal stabilizer
position signal is applied to the
trim speed monitor . With
the
trim speed monitor
in the low trim rate watch
mode, running the
primary pitch trim
at the high trim rate will
cause the trim speed mon-
itor to
illuminate the PITCH
TRIM light .
5- 1 4 PM-123
Change 2