Learjet 60 - SPOILER ARM Light; SPOILER EXT Light; SPOILER MON Light

Learjet 60
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Pilot's Manual
When
the lever is set to RET, both spoilers will retract . The spoilers may
be extended
partially by placing the spoiler lever between ARM and
EXT . When on the
ground, the spoilers will extend fully when the spoil-
er lever is in any position between ARM and EXT .
SPOILER
EXT LIGHT
The SPOILER EXT light,
located on the glareshield annunciator panel,
will illuminate steady whenever the flaps
are UP and the spoilers are
extended . The light will flash if the spoilers are extended and the flaps
are beyond
3° .
The
light is operated bya l'-up position switch for each
spoiler . The light will illuminate if
either l'-up switch is actuated ex-
cept during spoileron mode .
SPOILER ARM LIGHT
The SPOILER ARM light, on the glareshield annunciator panel,
will il-
luminate whenever the autospoiler mode is armed and remains illumi-
nated when
autospoilers are extended . The light will not illuminate
and the autospoiler
system will not arm
(SPOILER
ARM light will not
come on), or will disarm (SPOILER ARM light will
go out), if the squat
switches are in an asymmetric condition for more than approximately
2
minutes .
SPOILER MON LIGHT
The amber SPOILER MON light, located on the glareshield
annuncia-
tor panel, will illuminate whenever monitor circuits in the computer-
amplifier
detect a malfunction during the spoileron mode or unequal
spoiler extension during the
spoiler mode . Should the monitor detect a
malfunction during aileron augmentation,
the monitor will automati-
cally
disengage the spoileron mode and the spoilers will immediately
retract . If
the monitor has disabled aileron augmentation or the
SPOILERON circuit breaker
is pulled, normal spoiler mode operation
will not be available in flight ; however, the spoilers will
be available for
ground
operation . The autospoilers will also be operational but should
not be armed if the
SPOILERON circuit breaker is open . During the
spoiler mode, the SPOILER MON light will illuminate
and both spoil-
ers will retract in the event of unequal spoiler extension where
the dif-
ference is 6° or more . Additionally, the SPOILER MON light will also
illuminate if either
of the autospoiler dual logic circuits fail .
PM-123
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5-7
Change 4